diff --git a/CHANGELOG.md b/CHANGELOG.md
index 22244b029..96cfb75d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -115,12 +115,13 @@ For full details, see [ChangeLog](https://github.com/vladmandic/automatic/blob/m
   - refactor `hash-cache` management, thanks @awsr
   - validate all `reference` jsons and backfill all fields  
   - sticter `js` linting, thanks @awsr
+  - ui: add profiling info
   - ui: remove non-passive event listeners
   - ui: add debounce to ui updates
   - ui: utilize requestanimationframe for paint optimizations
   - ui: profile callbacks
   - ui: validate callbacks before use, thanks @awsr
-  - ui: log formatting  
+  - ui: log formatting
 - **Fixes**
   - Prohibit `python==3.14` unless `--experimental`
   - UI CSS fixes, thanks @awsr
@@ -139,6 +140,7 @@ For full details, see [ChangeLog](https://github.com/vladmandic/automatic/blob/m
   - controlnet processor error handling
   - error handling for same-device check
   - error handling for undefined pipeline
+  - erorr handling for `scripts` loader
   - patch `z-image` for fp16 compatibility, thanks @resonantsky
   - patch `unipc` for timesteps device placement, thanks @resonantsky
   - `civitai` search and base-model discovery improvements
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 2f247dafa..8efc252d1 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -35,6 +35,7 @@ const jsConfig = defineConfig([
         log: 'readonly',
         debug: 'readonly',
         error: 'readonly',
+        timer: 'readonly',
         xhrGet: 'readonly',
         xhrPost: 'readonly',
         gradioApp: 'readonly',
@@ -52,6 +53,7 @@ const jsConfig = defineConfig([
         getUICurrentTabContent: 'readonly',
         waitForFlag: 'readonly',
         logFn: 'readonly',
+        logTimers: 'readonly',
         generateForever: 'readonly',
         showContributors: 'readonly',
         opts: 'writable',
diff --git a/extensions-builtin/sdnext-modernui b/extensions-builtin/sdnext-modernui
index 055eb67c2..fe25f9a0b 160000
--- a/extensions-builtin/sdnext-modernui
+++ b/extensions-builtin/sdnext-modernui
@@ -1 +1 @@
-Subproject commit 055eb67c2b042ddc0dd333c35a7239b755acf32c
+Subproject commit fe25f9a0b23f764a6a05022e84a8538c02e6f53f
diff --git a/javascript/aspectRatioOverlay.js b/javascript/aspectRatioOverlay.js
index 380ebef80..293c41a4d 100644
--- a/javascript/aspectRatioOverlay.js
+++ b/javascript/aspectRatioOverlay.js
@@ -48,7 +48,7 @@ function dimensionChange(e, is_width, is_height) {
   }
 }
 
-onAfterUiUpdate(() => {
+function aspectRatioCallback() {
   const arPreviewRect = gradioApp().querySelector('#imageARPreview');
   if (arPreviewRect) arPreviewRect.style.display = 'none';
   const tabImg2img = gradioApp().querySelector('#tab_img2img');
@@ -68,4 +68,6 @@ onAfterUiUpdate(() => {
       });
     }
   }
-});
+}
+
+onAfterUiUpdate(aspectRatioCallback);
diff --git a/javascript/autocomplete.js b/javascript/autocomplete.js
index 9d4eab9c0..32bc505db 100644
--- a/javascript/autocomplete.js
+++ b/javascript/autocomplete.js
@@ -148,6 +148,7 @@ const engine = {
       this.indices.clear();
       return;
     }
+    const t0 = performance.now();
     const toLoad = enabled.filter((n) => !this.indices.has(n));
     const toRemove = [...this.indices.keys()].filter((n) => !enabled.includes(n));
     toRemove.forEach((n) => this.indices.delete(n));
@@ -164,7 +165,9 @@ const engine = {
             if (cat.name) this.categoryNames[id] = cat.name;
           });
         }
-        log('autoComplete', { loaded: name, tags: data.tags?.length || 0 });
+        const t1 = performance.now();
+        log('autoComplete', { loaded: name, tags: data.tags?.length || 0, time: Math.round(t1 - t0) });
+        timer(`autocompleteLoad:${name}`, t1 - t0);
       } catch (e) {
         log('autoComplete', { failed: name, error: e });
       }
@@ -508,6 +511,7 @@ function patchConfigBridge() {
 // -- Initialization --
 
 async function initAutocomplete() {
+  const t0 = performance.now();
   const enabled = window.opts?.autocomplete_enabled || [];
   active = window.opts?.autocomplete_active || false;
   log('autoComplete', { active, enabled });
@@ -543,9 +547,9 @@ async function initAutocomplete() {
       attached++;
     }
   });
-  log('autoComplete', { attached, dicts: engine.indices.size });
   // Reload when settings change
-  onOptionsChanged(async () => {
+
+  async function optionsChangedCallback() {
     const newActive = window.opts?.autocomplete_active || false;
     const newEnabled = window.opts?.autocomplete_enabled || [];
     const currentKeys = [...engine.indices.keys()].sort().join(',');
@@ -556,9 +560,13 @@ async function initAutocomplete() {
       active = newActive;
       patchActiveButton();
     }
-  });
+  }
+  onOptionsChanged(optionsChangedCallback);
   // Watch for config updates from the script UI bridge
   patchConfigBridge();
   patchActiveButton();
-  onAfterUiUpdate(() => patchConfigBridge());
+  onAfterUiUpdate(patchConfigBridge);
+  const t1 = performance.now();
+  log('autoComplete', { attached, dicts: engine.indices.size, time: Math.round(t1 - t0) });
+  timer('autocompleteInit', t1 - t0);
 }
diff --git a/javascript/control.js b/javascript/control.js
index 4d94fc643..06da73910 100644
--- a/javascript/control.js
+++ b/javascript/control.js
@@ -17,6 +17,7 @@ function controlInputMode(inputMode, ...args) {
 }
 
 async function setupControlUI() {
+  const t0 = performance.now();
   const tabs = ['input', 'output', 'preview'];
   for (const tab of tabs) {
     const btn = gradioApp().getElementById(`control-${tab}-button`);
@@ -46,5 +47,7 @@ async function setupControlUI() {
   });
   intersectionObserver.observe(el); // monitor visibility of tab
 
-  log('initControlUI');
+  const t1 = performance.now();
+  log('setupControlUI', Math.round(t1 - t0));
+  timer('setupControlUI', t1 - t0);
 }
diff --git a/javascript/extraNetworks.js b/javascript/extraNetworks.js
index eaf516ff2..d0c438671 100644
--- a/javascript/extraNetworks.js
+++ b/javascript/extraNetworks.js
@@ -217,6 +217,7 @@ async function filterExtraNetworksForTab(searchTerm) {
   }
   const t1 = performance.now();
   log(`filterExtraNetworks: text="${searchTerm}" items=${items} match=${found} time=${Math.round(t1 - t0)}`);
+  timer(`filterExtraNetworks:${searchTerm}`, t1 - t0);
 }
 
 function tryToRemoveExtraNetworkFromPrompt(textarea, text) {
@@ -282,6 +283,7 @@ function sortExtraNetworks(fixed = 'no') {
   const desc = sortDesc[sortVal];
   const t1 = performance.now();
   log('sortNetworks', { name: pagename, val: sortVal, order: desc, fixed: fixed === 'fixed', items: num, time: Math.round(t1 - t0) });
+  timer(`sortExtraNetworks:${desc}`, t1 - t0);
   return desc;
 }
 
diff --git a/javascript/gallery.js b/javascript/gallery.js
index 297a7ef36..377577892 100644
--- a/javascript/gallery.js
+++ b/javascript/gallery.js
@@ -855,7 +855,8 @@ async function gallerySearch() {
     }
 
     const t1 = performance.now();
-    updateStatusWithSort('Filter', ['Images', `${totalFound.toLocaleString()} / ${allFiles.length.toLocaleString()}`], `${iconStopwatch} ${Math.floor(t1 - t0).toLocaleString()}ms`);
+    updateStatusWithSort('Filter', ['Images', `${totalFound.toLocaleString()} / ${allFiles.length.toLocaleString()}`], `${iconStopwatch} ${Math.round(t1 - t0).toLocaleString()}ms`);
+    timer(`galleryFilter:${str}`, t1 - t0);
     refreshGallerySelection();
   }, 250);
 }
@@ -936,7 +937,8 @@ async function gallerySort(key) {
 
   const t1 = performance.now();
   log(`gallerySort: sort=${sortMode.name} len=${arr.length} time=${Math.floor(t1 - t0)}`);
-  updateStatusWithSort(['Images', arr.length.toLocaleString()], `${iconStopwatch} ${Math.floor(t1 - t0).toLocaleString()}ms`);
+  updateStatusWithSort(['Images', arr.length.toLocaleString()], `${iconStopwatch} ${Math.round(t1 - t0).toLocaleString()}ms`);
+  timer(`gallerySort:${sortMode.name}`, t1 - t0);
   refreshGallerySelection();
 }
 
@@ -1025,7 +1027,8 @@ async function thumbCacheCleanup(folder, imgCount, controller, force = false) {
       await idbFolderCleanup(keptGalleryHashes, recursiveFolder, controller.signal)
         .then((delcount) => {
           const t1 = performance.now();
-          log(`Thumbnail DB cleanup: folder=${folder} kept=${keptGalleryHashes.size} deleted=${delcount} time=${Math.floor(t1 - t0)}ms`);
+          log(`Thumbnail DB cleanup: folder=${folder} kept=${keptGalleryHashes.size} deleted=${delcount} time=${Math.round(t1 - t0)}ms`);
+          timer(`thumbnailDBCleanup:${folder}`, t1 - t0);
           currentGalleryFolder = null;
           el.clearCacheFolder.innerText = '<select a folder first>';
           updateStatusWithSort('Thumbnail cache cleared');
@@ -1139,6 +1142,7 @@ async function fetchFilesHT(evt, controller) {
 
   const t1 = performance.now();
   log(`gallery: folder=${evt.target.name} num=${numFiles} time=${Math.floor(t1 - t0)}ms`);
+  timer(`galleryFetch:${evt.target.name}`, t1 - t0);
   updateStatusWithSort(['Folder', evt.target.name], ['Images', numFiles.toLocaleString()], `${iconStopwatch} ${Math.floor(t1 - t0).toLocaleString()}ms`);
   galleryProgressBar.start(numFiles);
   addSeparators();
@@ -1320,7 +1324,7 @@ async function blockQueueUntilReady() {
 }
 
 async function initGallery() { // triggered on gradio change to monitor when ui gets sufficiently constructed
-  log('initGallery');
+  const t0 = performance.now();
   el.folders = gradioApp().getElementById('tab-gallery-folders');
   el.files = gradioApp().getElementById('tab-gallery-files');
   el.status = gradioApp().getElementById('tab-gallery-status');
@@ -1363,6 +1367,9 @@ async function initGallery() { // triggered on gradio change to monitor when ui
     'outdir_img2img_grids',
     'outdir_control_grids',
   ].forEach((op) => { monitorOption(op, updateFolders); });
+  const t1 = performance.now();
+  log('initGallery', Math.round(t1 - t0));
+  timer('initGallery', t1 - t0);
 }
 
 // register on startup
diff --git a/javascript/generationParams.js b/javascript/generationParams.js
index 8847e3535..33219e916 100644
--- a/javascript/generationParams.js
+++ b/javascript/generationParams.js
@@ -20,6 +20,7 @@ let control_gallery;
 let modal;
 
 async function initiGenerationParams() {
+  const t0 = performance.now();
   if (!modal) modal = gradioApp().getElementById('lightboxModal');
   if (!modal) return;
 
@@ -37,5 +38,7 @@ async function initiGenerationParams() {
   if (!img2img_gallery) img2img_gallery = attachGalleryListeners('img2img');
   if (!control_gallery) control_gallery = attachGalleryListeners('control');
   modalObserver.observe(modal, { attributes: true, attributeFilter: ['style'] });
-  log('initGenerationParams');
+  const t1 = performance.now();
+  log('initGenerationParams', Math.round(t1 - t0));
+  timer('initGenerationParams', t1 - t0);
 }
diff --git a/javascript/imageViewer.js b/javascript/imageViewer.js
index 53caa3c6c..c4a042506 100644
--- a/javascript/imageViewer.js
+++ b/javascript/imageViewer.js
@@ -235,6 +235,7 @@ async function bindImageViewer() {
 }
 
 async function initImageViewer() {
+  const t0 = performance.now();
   // main elements
   const modal = document.createElement('div');
   modal.id = 'lightboxModal';
@@ -341,7 +342,9 @@ async function initImageViewer() {
   modal.append(modalExif);
 
   gradioApp().appendChild(modal);
-  log('initImageViewer');
+  const t1 = performance.now();
+  log('initImageViewer', Math.round(t1 - t0));
+  timer('initImageViewer', t1 - t0);
 }
 
 onAfterUiUpdate(bindImageViewer);
diff --git a/javascript/loader.js b/javascript/loader.js
index 733408bb9..39186f858 100644
--- a/javascript/loader.js
+++ b/javascript/loader.js
@@ -66,6 +66,7 @@ async function removeSplash() {
   log('removeSplash');
   const t = Math.round(performance.now() - appStartTime);
   log('startupTime', t);
+  timer('splashVisible', t);
   xhrPost(`${window.api}/log`, { message: `ready time=${t}` });
   monitorLogActive = false;
 }
diff --git a/javascript/logMonitor.js b/javascript/logMonitor.js
index 3534b9e51..19d8290ff 100644
--- a/javascript/logMonitor.js
+++ b/javascript/logMonitor.js
@@ -103,6 +103,7 @@ async function logMonitor() {
 async function initLogMonitor() {
   const el = document.getElementsByTagName('footer')[0];
   if (!el) return;
+  const t0 = performance.now();
   el.classList.add('log-monitor');
   const ui_disabled = Array.isArray(window.opts.ui_disabled) ? window.opts.ui_disabled : [];
   if (ui_disabled.includes('logs')) return;
@@ -126,5 +127,7 @@ async function initLogMonitor() {
   el.style.display = 'none';
   authFetch(`${window.api}/start?agent=${encodeURI(navigator.userAgent)}`);
   logMonitor();
-  log('initLogMonitor');
+  const t1 = performance.now();
+  log('initLogMonitor', Math.round(t1 - t0));
+  timer('initLogMonitor', t1 - t0);
 }
diff --git a/javascript/promptChecker.js b/javascript/promptChecker.js
index e6a269d78..abe5e81b8 100644
--- a/javascript/promptChecker.js
+++ b/javascript/promptChecker.js
@@ -27,7 +27,7 @@ function setupBracketChecking(idPrompt, idCounter) {
 }
 
 async function initPromptChecker() {
-  log('initPromptChecker');
+  const t0 = performance.now();
   setupBracketChecking('txt2img_prompt', 'txt2img_token_counter');
   setupBracketChecking('txt2img_neg_prompt', 'txt2img_negative_token_counter');
   setupBracketChecking('img2img_prompt', 'img2img_token_counter');
@@ -36,4 +36,7 @@ async function initPromptChecker() {
   setupBracketChecking('control_neg_prompt', 'control_negative_token_counter');
   setupBracketChecking('video_prompt', 'video_token_counter');
   setupBracketChecking('video_neg_prompt', 'video_negative_token_counter');
+  const t1 = performance.now();
+  log('initPromptChecker', Math.round(t1 - t0));
+  timer('initPromptChecker', t1 - t0);
 }
diff --git a/javascript/script.js b/javascript/script.js
index cec278867..c4428584e 100644
--- a/javascript/script.js
+++ b/javascript/script.js
@@ -1,3 +1,5 @@
+window.gradioObserver = null;
+
 async function sleep(ms) {
   return new Promise((resolve) => { setTimeout(resolve, ms); });
 }
@@ -15,6 +17,7 @@ function logFn(func) { // not recommended: use log, debug or error explicitly
     const returnValue = func(...arguments);
     const t1 = performance.now();
     log(func.name, `time=${Math.round(t1 - t0)}`);
+    timer(func.name, t1 - t0);
     return returnValue;
   };
 }
@@ -95,6 +98,7 @@ function executeCallbacks(queue, arg) {
       callback(arg);
       const t1 = performance.now();
       if (t1 - t0 > 250) log('callbackSlow', callback.name || callback, `time=${Math.round(t1 - t0)}`);
+      timer(callback.name || 'anonymousCallback', t1 - t0);
     } catch (e) {
       error(`executeCallbacks: ${callback} ${e}`);
     }
@@ -149,8 +153,8 @@ async function mutationCallback(mutations) {
 
 document.addEventListener('DOMContentLoaded', () => {
   log('DOMContentLoaded');
-  const mutationObserver = new MutationObserver(mutationCallback);
-  mutationObserver.observe(gradioApp(), { childList: true, subtree: true, attributes: false });
+  window.gradioObserver = new MutationObserver(mutationCallback);
+  window.gradioObserver.observe(gradioApp(), { childList: true, subtree: true, attributes: false });
 });
 
 /**
diff --git a/javascript/setHints.js b/javascript/setHints.js
index b35fd0eb3..4e4637ae1 100644
--- a/javascript/setHints.js
+++ b/javascript/setHints.js
@@ -1,3 +1,4 @@
+window.hintsObserver = null;
 const allLocales = ['en', 'tb', 'nb', 'hr', 'es', 'it', 'fr', 'de', 'pt', 'ru', 'zh', 'ja', 'ko', 'hi', 'ar', 'bn', 'ur', 'id', 'vi', 'tr', 'sr', 'po', 'he', 'xx', 'qq', 'tlh'];
 const localeData = {
   prev: null,
@@ -11,7 +12,6 @@ const localeData = {
   btn: null,
   expandTimeout: null, // Property for expansion timeout
   currentElement: null, // Track current element for expansion
-  observer: null, // MutationObserver for DOM changes
 };
 let localeTimeout = null;
 const isTouchDevice = 'ontouchstart' in window;
@@ -73,7 +73,7 @@ async function tooltipCreate() {
     gradioApp().addEventListener('pointerover', tooltipShowDelegated); // eslint-disable-line no-use-before-define
     gradioApp().addEventListener('pointerout', tooltipHideDelegated); // eslint-disable-line no-use-before-define
   }
-  if (!localeData.observer) initializeDOMObserver(); // eslint-disable-line no-use-before-define
+  if (!window.hintsObserver) initializeDOMObserver(); // eslint-disable-line no-use-before-define
 }
 
 async function expandTooltip(element, longHint) {
@@ -345,6 +345,7 @@ async function setHints() {
   localeData.finished = true;
   localeData.initial = false;
   const t1 = performance.now();
+  timer('setHints', t1 - t0);
   // localeData.btn.style.backgroundColor = localeData.locale !== 'en' ? 'var(--primary-500)' : '';
   log('touchDevice', isTouchDevice);
   log('setHints', { type: localeData.type, locale: localeData.locale, elements: elements.length, localized, hints, data: localeData.data.length, override: overrideData.length, time: Math.round(t1 - t0) });
@@ -379,11 +380,11 @@ async function applyHintToElement(el) {
 
 // Initialize MutationObserver for immediate hint application
 function initializeDOMObserver() {
-  if (localeData.observer) {
-    localeData.observer.disconnect();
+  if (window.hintsObserver) {
+    window.hintsObserver.disconnect();
   }
 
-  localeData.observer = new MutationObserver((mutations) => {
+  window.hintsObserver = new MutationObserver((mutations) => {
     // Process added nodes immediately
     for (const mutation of mutations) {
       if (mutation.type === 'childList') {
@@ -421,7 +422,7 @@ function initializeDOMObserver() {
   // Start observing the entire gradio app for changes
   const targetNode = gradioApp();
   if (targetNode) {
-    localeData.observer.observe(targetNode, {
+    window.hintsObserver.observe(targetNode, {
       childList: true,
       subtree: true,
     });
diff --git a/javascript/settings.js b/javascript/settings.js
index 798e4ac82..d23229efe 100644
--- a/javascript/settings.js
+++ b/javascript/settings.js
@@ -46,9 +46,7 @@ async function updateOpts(json_string) {
     }
   }
 
-  const t2 = performance.now();
   window.opts = new_opts;
-  log('updateOpts', `settings=${Object.keys(new_opts).length} callbacks=${Math.round(t2 - t1)} apply=${Math.round(t1 - t0)}`);
   Object.entries(opts_metadata).forEach(([opt, meta]) => {
     if (!opts_tabs[meta.tab_name]) opts_tabs[meta.tab_name] = {};
     if (!opts_tabs[meta.tab_name].unsaved_keys) opts_tabs[meta.tab_name].unsaved_keys = new Set();
@@ -56,6 +54,9 @@ async function updateOpts(json_string) {
     if (!meta.is_stored) opts_tabs[meta.tab_name].unsaved_keys.add(opt);
     else opts_tabs[meta.tab_name].saved_keys.add(opt);
   });
+  const t2 = performance.now();
+  log('updateOpts', `settings=${Object.keys(new_opts).length} callbacks=${Math.round(t2 - t1)} apply=${Math.round(t1 - t0)}`);
+  timer('updateOpts', t2 - t0);
 }
 
 function showAllSettings() {
@@ -201,6 +202,7 @@ async function initModels() {
 
 async function initSettings() {
   if (settingsInitialized) return;
+  const t0 = performance.now();
   settingsInitialized = true;
   const tabNavElements = gradioApp().querySelector('#settings > .tab-nav');
   if (!tabNavElements) {
@@ -228,5 +230,7 @@ async function initSettings() {
     tabContentWrapper.appendChild(elem);
     observer.observe(elem, { attributes: true, attributeFilter: ['style'] });
   });
-  log('initSettings');
+  const t1 = performance.now();
+  log('initSettings', Math.round(t1 - t0));
+  timer('initSettings', t1 - t0);
 }
diff --git a/javascript/startup.js b/javascript/startup.js
index 7168b0a9d..04f85ba45 100644
--- a/javascript/startup.js
+++ b/javascript/startup.js
@@ -2,6 +2,8 @@
 window.api = '/sdapi/v1';
 window.subpath = '';
 
+const startupPromises = [];
+
 async function waitForOpts() {
   // make sure all of the ui is ready and options are loaded
   const t0 = performance.now();
@@ -14,7 +16,8 @@ async function waitForOpts() {
     if (window.opts && Object.keys(window.opts).length > 0) {
       ok = window.opts.theme_type === 'Modern' ? 'uiux_separator_appearance' in window.opts : true;
       if (ok) {
-        log('waitForOpts', `time=${Math.round(t1 - t0)}`);
+        log('waitForOpts', Math.round(t1 - t0));
+        timer('waitForOpts', t1 - t0);
         break;
       }
     }
@@ -23,54 +26,70 @@ async function waitForOpts() {
   }
 }
 
+async function postStartup() {
+  log('postStartup');
+  if (window.gradioObserver) window.gradioObserver.disconnect();
+  if (window.hintsObserver) window.hintsObserver.disconnect();
+  logTimers();
+}
+
 async function initStartup() {
   const t0 = performance.now();
-  log('initGradio', `time=${Math.round(t0 - appStartTime)}`);
+  log('initGradio', Math.round(t0 - appStartTime));
+  timer('initGradio', t0 - appStartTime);
   log('initUi');
   if (window.setupLogger) await setupLogger();
 
   // all items here are non-blocking async calls
-  initModels();
-  getUIDefaults();
-  initPromptChecker();
-  initContextMenu();
-  initDragDrop();
-  initAccordions();
-  initSettings();
-  initImageViewer();
-  initiGenerationParams();
-  initChangelog();
-  setupControlUI();
+
+  startupPromises.push(initModels());
+  startupPromises.push(getUIDefaults());
+  startupPromises.push(initPromptChecker());
+  startupPromises.push(initContextMenu());
+  startupPromises.push(initDragDrop());
+  startupPromises.push(initAccordions());
+  startupPromises.push(initSettings());
+  startupPromises.push(initImageViewer());
+  startupPromises.push(initiGenerationParams());
+  startupPromises.push(initChangelog());
+  startupPromises.push(setupControlUI());
 
   // reconnect server session
   await reconnectUI();
   await waitForOpts();
-  await initGallery();
 
   log('mountURL', window.opts.subpath);
   if (window.opts.subpath?.length > 0) {
     window.subpath = window.opts.subpath;
     window.api = `${window.subpath}/sdapi/v1`;
   }
-  setRefreshInterval();
+
   executeCallbacks(uiReadyCallbacks);
-  setupExtraNetworks();
+  startupPromises.push(initGallery());
+  startupPromises.push(setRefreshInterval());
+  startupPromises.push(setupExtraNetworks());
 
   // optinally wait for modern ui
   if (window.waitForUiReady) await waitForUiReady();
-  initAutocomplete();
-  monitorConnection();
 
   // post startup tasks that may take longer but are not critical
-  showNetworks();
-  setHints();
-  applyStyles();
-  initIndexDB();
-  initLogMonitor();
+  startupPromises.push(initAutocomplete());
+  startupPromises.push(monitorConnection());
+  startupPromises.push(showNetworks());
+  startupPromises.push(setHints());
+  startupPromises.push(applyStyles());
+  startupPromises.push(initIndexDB());
+  startupPromises.push(initLogMonitor());
+
   t1 = performance.now();
   log('initStartup', Math.round(1000 * (t1 - t0) / 1000000));
 
   removeSplash();
+
+  await Promise.all(startupPromises);
+  t2 = performance.now();
+  log('initComplete', Math.round(1000 * (t2 - t0) / 1000000));
+  postStartup();
 }
 
 onUiLoaded(initStartup);
diff --git a/javascript/timers.js b/javascript/timers.js
new file mode 100644
index 000000000..dfe911ab4
--- /dev/null
+++ b/javascript/timers.js
@@ -0,0 +1,14 @@
+const allTimers = [];
+
+async function timer(name, elapsed) {
+  allTimers.push([name, Math.round(elapsed)]);
+}
+
+async function logTimers() {
+  allTimers.sort((a, b) => b[1] - a[1]);
+  const filteredTimers = allTimers.filter((t) => t[1] > 50);
+  log('timers', filteredTimers);
+  // xhrPost(`${window.api}/log`, { debug: JSON.stringify(filteredTimers) });
+}
+
+window.timer = timer;
diff --git a/javascript/ui.js b/javascript/ui.js
index 9a939d282..19df02686 100644
--- a/javascript/ui.js
+++ b/javascript/ui.js
@@ -163,6 +163,7 @@ function setFontSize(val, old) {
     appliedFontSize = nextSize;
     const t1 = performance.now();
     log('setFontSize', nextSize, `time=${Math.round(t1 - t0)}`);
+    timer('setFontSize', t1 - t0);
   });
 }
 
@@ -473,6 +474,7 @@ function registerTextareaCallback() {
   // sortUIElements();
   if (promptsInitialized) return;
   if (promptRegistrationInProgress) return;
+  const t0 = performance.now();
 
   const app = gradioApp();
   if (!app) return;
@@ -540,7 +542,9 @@ function registerTextareaCallback() {
     promptsInitialized = registeredPromptIds.size === total;
     if (promptsInitialized) {
       promptRegistrationInProgress = false;
-      log('initPrompts', registeredPromptIds.size);
+      const t1 = performance.now();
+      log('initPrompts', { count: registeredPromptIds.size, time: Math.round(t1 - t0) });
+      timer('initPrompts', t1 - t0);
       return;
     }
 
@@ -709,6 +713,7 @@ async function browseFolder() {
 }
 
 async function reconnectUI() {
+  const t0 = performance.now();
   const gallery = gradioApp().getElementById('txt2img_gallery');
   const task_id = localStorage.getItem('task');
   const api_logo = Array.from(gradioApp().querySelectorAll('img')).filter((el) => el?.src?.endsWith('api-logo.svg'));
@@ -738,5 +743,7 @@ async function reconnectUI() {
   };
   const sd_model_observer = new MutationObserver(sd_model_callback);
   sd_model_observer.observe(sd_model, { attributes: true, childList: true, subtree: true });
-  log('reconnectUI');
+  const t1 = performance.now();
+  log('reconnectUI', Math.round(t1 - t0));
+  timer('reconnectUI', t1 - t0);
 }
diff --git a/modules/api/models.py b/modules/api/models.py
index ce0059bf1..8edb0fa1d 100644
--- a/modules/api/models.py
+++ b/modules/api/models.py
@@ -400,6 +400,7 @@ class ReqGetLog(BaseModel):
 
 
 class ReqPostLog(BaseModel):
+    json: dict | None = Field(default=None, title="Data", description="The data to log")
     message: str | None = Field(default=None, title="Message", description="The info message to log")
     debug: str | None = Field(default=None, title="Debug message", description="The debug message to log")
     error: str | None = Field(default=None, title="Error message", description="The error message to log")
diff --git a/modules/api/server.py b/modules/api/server.py
index aa77cbae2..7daf91af5 100644
--- a/modules/api/server.py
+++ b/modules/api/server.py
@@ -71,11 +71,13 @@ def get_log(req: models.ReqGetLog = Depends()):
     return lines
 
 def post_log(req: models.ReqPostLog):
-    if req.message is not None:
+    if req.json is not None:
+        log.info(f'UI {req.message or ""}: {req.json}')
+    elif req.message is not None:
         log.info(f'UI: {req.message}')
-    if req.debug is not None:
+    elif req.debug is not None:
         log.debug(f'UI: {req.debug}')
-    if req.error is not None:
+    elif req.error is not None:
         log.error(f'UI: {req.error}')
     return {}
 
diff --git a/modules/scripts_manager.py b/modules/scripts_manager.py
index 45ef6ef0f..25bf6cf2e 100644
--- a/modules/scripts_manager.py
+++ b/modules/scripts_manager.py
@@ -187,20 +187,19 @@ class Script:
         """
         pass # pylint: disable=unnecessary-pass
 
+    """
+    # script can define two methods below, they are not defined by default to skip unnecessary calls for scripts that don't need this functionality
     def before_component(self, component: IOComponent, **kwargs):
-        """
-        Called before a component is created.
-        Use elem_id/label fields of kwargs to figure out which component it is.
-        This can be useful to inject your own components somewhere in the middle of vanilla UI.
-        You can return created components in the ui() function to add them to the list of arguments for your processing functions
-        """
+        # Called before a component is created.
+        # Use elem_id/label fields of kwargs to figure out which component it is.
+        # This can be useful to inject your own components somewhere in the middle of vanilla UI.
+        # You can return created components in the ui() function to add them to the list of arguments for your processing functions
         pass # pylint: disable=unnecessary-pass
 
     def after_component(self, component: IOComponent, **kwargs):
-        """
-        Called after a component is created. Same as above.
-        """
+        # Called after a component is created. Same as above.
         pass # pylint: disable=unnecessary-pass
+    """
 
     def describe(self):
         """unused"""
@@ -453,7 +452,6 @@ class ScriptRunner:
             script.name = wrap_call(script.title, script.filename, "title", default=script.filename).lower()
             api_args = []
             for control in controls:
-                debug(f'Script control: parent={script.parent} script="{script.name}" label="{control.label}" type={control} id={control.elem_id}')
                 if hasattr(gr.components, 'IOComponent'):
                     if not isinstance(control, gr.components.IOComponent):
                         log.error(f'Invalid script control: "{script.filename}" control={control}')
@@ -462,6 +460,7 @@ class ScriptRunner:
                     if not isinstance(control, gr.components.Component):
                         log.error(f'Invalid script control: "{script.filename}" control={control}')
                         continue
+                debug(f'Script control: parent={script.parent} script="{script.name}" label="{control.label}" type={control} id={control.elem_id}')
                 control.custom_script_source = os.path.basename(script.filename)
                 arg_info = api_models.ScriptArg(label=control.label or "")
                 for field in ("value", "minimum", "maximum", "step", "choices"):
@@ -498,7 +497,10 @@ class ScriptRunner:
                     continue
                 t0 = time.time()
                 with gr.Group(elem_id=f'{parent}_script_{script.title().lower().replace(" ", "_")}', elem_classes=['group-extension']) as group:
-                    create_script_ui(script, inputs, inputs_alwayson)
+                    try:
+                        create_script_ui(script, inputs, inputs_alwayson)
+                    except Exception as e:
+                        errors.display(e, f'Create Script UI: type=internal fn="{script.filename}"')
                 script.group = group
                 time_setup[script.title()] = time_setup.get(script.title(), 0) + (time.time()-t0)
 
@@ -513,7 +515,10 @@ class ScriptRunner:
                         continue
                     t0 = time.time()
                     with gr.Group(elem_id=f'{parent}_script_{script.title().lower().replace(" ", "_")}', elem_classes=['group-extension']) as group:
-                        create_script_ui(script, inputs, inputs_alwayson)
+                        try:
+                            create_script_ui(script, inputs, inputs_alwayson)
+                        except Exception as e:
+                            errors.display(e, f'Create Script UI: type=builtin fn="{script.filename}"')
                     script.group = group
                     time_setup[script.title()] = time_setup.get(script.title(), 0) + (time.time()-t0)
 
@@ -528,7 +533,10 @@ class ScriptRunner:
                         continue
                     t0 = time.time()
                     with gr.Group(elem_id=f'{parent}_script_{script.title().lower().replace(" ", "_")}', elem_classes=['group-extension']) as group:
-                        create_script_ui(script, inputs, inputs_alwayson)
+                        try:
+                            create_script_ui(script, inputs, inputs_alwayson)
+                        except Exception as e:
+                            errors.display(e, f'Create Script UI: type=extension fn="{script.filename}"')
                     script.group = group
                     time_setup[script.title()] = time_setup.get(script.title(), 0) + (time.time()-t0)
 
@@ -539,7 +547,10 @@ class ScriptRunner:
                 continue
             with gr.Group(elem_id=f'{parent}_script_{script.title().lower().replace(" ", "_")}', elem_classes=['group-scripts'], visible=False) as group:
                 t0 = time.time()
-                create_script_ui(script, inputs, inputs_alwayson)
+                try:
+                    create_script_ui(script, inputs, inputs_alwayson)
+                except Exception as e:
+                    errors.display(e, f'Create Script UI: type=selectable fn="{script.filename}"')
                 time_setup[script.title()] = time_setup.get(script.title(), 0) + (time.time()-t0)
                 script.group = group
 
@@ -737,28 +748,42 @@ class ScriptRunner:
         s.report()
 
     def before_component(self, component: IOComponent, **kwargs):
+        if component is None or isinstance(component, gr.Blocks):
+            return
         s = ScriptSummary('before-component')
         for script in self.scripts:
+            if not hasattr(script, 'before_component'):
+                continue
+            for elem_id, callback in script.on_before_component_elem_id:
+                if elem_id == kwargs.get("elem_id"):
+                    try:
+                        callback(OnComponent(component=component))
+                    except Exception as e:
+                        errors.display(e, f"Running script before component: id={elem_id} fn={script.filename}")
             try:
                 script.before_component(component, **kwargs)
             except Exception as e:
-                errors.display(e, f'Running script before component: {script.filename}')
+                errors.display(e, f'Running script before component: fn={script.filename}')
             s.record(script.title())
         s.report()
 
     def after_component(self, component: IOComponent, **kwargs):
+        if component is None or isinstance(component, gr.Blocks):
+            return
         s = ScriptSummary('after-component')
         for script in self.scripts:
+            if not hasattr(script, 'after_component'):
+                continue
             for elem_id, callback in script.on_after_component_elem_id:
                 if elem_id == kwargs.get("elem_id"):
                     try:
                         callback(OnComponent(component=component))
                     except Exception as e:
-                        errors.display(e, f"Running script before_component_elem_id: {script.filename}")
+                        errors.display(e, f"Running script after component: id={elem_id} fn={script.filename}")
             try:
                 script.after_component(component, **kwargs)
             except Exception as e:
-                errors.display(e, f'Running script after component: {script.filename}')
+                errors.display(e, f'Running script after component: fn={script.filename}')
             s.record(script.title())
         s.report()
 
diff --git a/scripts/prompt_enhance.py b/scripts/prompt_enhance.py
index ecb0e499b..764b978ac 100644
--- a/scripts/prompt_enhance.py
+++ b/scripts/prompt_enhance.py
@@ -929,12 +929,14 @@ class PromptEnhanceScript(scripts_manager.Script):
                         clear_btn = gr.Button(value='Clear', elem_id='prompt_enhance_clear', variant='secondary')
                         clear_btn.click(fn=lambda: '', inputs=[], outputs=[prompt_output])
                         copy_btn = gr.Button(value='Set prompt', elem_id='prompt_enhance_copy', variant='secondary')
-                        copy_btn.click(fn=lambda x: x, inputs=[prompt_output], outputs=[self.prompt])
+                        if self.prompt: # not registered for api script runner
+                            copy_btn.click(fn=lambda x: x, inputs=[prompt_output], outputs=[self.prompt])
             if self.image is None:
                 self.image = gr.Image(type='pil', interactive=False, visible=False, width=64, height=64) # dummy image
             # Update vision toggle interactivity when model changes
             llm_model.change(fn=self.update_vision_toggle, inputs=[llm_model], outputs=[use_vision], show_progress=False)
-            apply_btn.click(fn=self.apply, inputs=[self.prompt, self.image, apply_prompt, llm_model, prompt_system, prompt_prefix, prompt_suffix, max_tokens, do_sample, temperature, repetition_penalty, top_k, top_p, thinking_mode, nsfw_mode, use_vision, prefill_text, keep_prefill, keep_thinking], outputs=[prompt_output, self.prompt])
+            if self.prompt:
+                apply_btn.click(fn=self.apply, inputs=[self.prompt, self.image, apply_prompt, llm_model, prompt_system, prompt_prefix, prompt_suffix, max_tokens, do_sample, temperature, repetition_penalty, top_k, top_p, thinking_mode, nsfw_mode, use_vision, prefill_text, keep_prefill, keep_thinking], outputs=[prompt_output, self.prompt])
         return [self.prompt, self.image, apply_auto, llm_model, prompt_system, prompt_prefix, prompt_suffix, max_tokens, do_sample, temperature, repetition_penalty, top_k, top_p, thinking_mode, nsfw_mode, use_vision, prefill_text, keep_prefill, keep_thinking]
 
     def after_component(self, component, **_kwargs): # searching for actual ui prompt components