8000 bug #54421 [WebProfilerBundle] Improve performance (javiereguiluz) · symfony/symfony@c29b7a9 · GitHub
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bug #54421 [WebProfilerBundle] Improve performance (javiereguiluz)
This PR was squashed before being merged into the 7.1 branch. Discussion ---------- [WebProfilerBundle] Improve performance | Q | A | ------------- | --- | Branch? | 7.1 | Bug fix? | yes | New feature? | no | Deprecations? | no | Issues | - | License | MIT This PR tries to solve the following problem: When clicking on panels like `Logs` or `Doctrine`, the page contents take some time to be ready ... and the JavaScript code that runs to change/Add things to UI, produces visible jumps: https://github.com/symfony/symfony/assets/73419/5c980dc3-796b-4230-af9a-d63dfacb5240 ----- I debugged this behavior and the browser shows a "Long Task" warning message but not many other details: ![image](https://github.com/symfony/symfony/assets/73419/ba1cd26e-1984-4893-96a6-f90340b0ef0d) I followed Google's recommendations: https://web.dev/articles/optimize-long-tasks and split the `SymfonyProfiler` tasks in two group: critical (menu and tabs) and normal (the rest of features). That change in addition to `<meta name="view-transition" content="same-origin">` improves the situation, but it's still not perfect. So, this PR is mostly **a call for help to JavaScript experts**. Please help us make the UI as fast as possible. Thanks! Commits ------- 29a271b [WebProfilerBundle] Improve performance
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‎src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/base.html.twig

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<meta charset="{{ _charset }}" />
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<meta name="robots" content="noindex,nofollow" />
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<meta name="viewport" content="width=device-width,initial-scale=1" />
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<meta name="view-transition" content="same-origin">
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<title>{% block title %}Symfony Profiler{% endblock %}</title>
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{% set request_collector = profile is defined ? profile.collectors.request|default(null) : null %}

‎src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/base_js.html.twig

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class SymfonyProfiler {
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constructor() {
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this.#reorderMainMenuItems();
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this.#createTabs();
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this.#createTableSearchFields();
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this.#createToggles();
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this.#createCopyToClipboard();
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this.#convertDateTimesToUserTimezone();
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}
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#reorderMainMenuItems() {
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/* reorder the main menu items to always display first the non-disabled items */
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const mainMenuElement = document.querySelector('#menu-profiler');
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const firstDisabledMenuItem = mainMenuElement.querySelector('li a > span.disabled')?.parentNode?.parentNode;
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if (!firstDisabledMenuItem) {
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return;
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}
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const mainMenuItems = mainMenuElement.querySelectorAll('li');
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mainMenuItems.forEach(menuItem => {
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const isDisabled = null !== menuItem.querySelector('a > span.disabled');
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if (!isDisabled) {
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mainMenuElement.insertBefore(menuItem, firstDisabledMenuItem);
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}
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});
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}
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#createTabs() {
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/* the accessibility options of this component have been defined according to: */
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/* www.w3.org/WAI/ARIA/apg/example-index/tabs/tabs-manual.html */

‎src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/profiler.css.twig

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list-style-type: none;
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margin: 0;
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padding: 7px;
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display: flex;
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flex-direction: column;
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}
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#menu-profiler li {
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margin-bottom: 0;
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position: relative;
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}
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#menu-profiler li:has(span.disabled) {
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order: 1;
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}
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#menu-profiler li + li {
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margin-top: 4px;
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}

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