內容簡介
Arvexa Performance Overlay 是一款專為網站管理員設計的外掛，提供即時性能監控面板，幫助用戶快速了解頁面性能數據，識別影響網站速度的因素，從而優化網站效能。
【主要功能】
• 實時性能數據顯示
• 插件和佈景主題成本分析
• 網路請求和傳輸字節統計
• 渲染性能指標（LCP、CLS、INP）
• 重複查詢檢測
• 深度診斷功能（需 Pro 版）
外掛標籤
開發者團隊
原文外掛簡介
Arvexa Performance Overlay shows a small pill in the corner of every page — for administrators only. Click it and you get a live panel with everything that matters about the page you are looking at:
Server — PHP generation time, SQL query count and total time, peak memory, number of enqueued scripts and styles, total size of autoloaded options, and the lifecycle phase that ate the biggest share of PHP time.
Components — the cost of every plugin and theme on this page: SQL queries and time on the server side, requests and transferred bytes on the asset side. The answer to “which plugin slowed us down” in one glance.
Network — TTFB, request count, transferred bytes.
Rendering — LCP (and which element it is), CLS, INP, DOM node count, long tasks. Official Web Vitals thresholds, color-coded.
AJAX / REST — every same-origin admin-ajax, wc-ajax and REST call timed as it happens.
Slowest queries — the top queries with timings.
Repeated queries — detects duplicate and N+1-shaped SQL statements so you can find cacheable or batchable work.
LCP diagnosis — identifies the LCP element and its likely blocker, such as a CSS background, late discovery, a lazy image or server delay.
Performance Pulse — an optional wide dark dashboard with visual PHP, LCP, CLS and INP indicators. It also links to PageSpeed Insights for independent Mobile and Desktop lab checks.
How it works
Per-query plugin attribution uses the log_query_custom_data filter and a backtrace scan — no core hacks, no db.php drop-in.
The plugin never enables or changes SAVEQUERIES. To collect query timings, a site administrator may explicitly add define( 'SAVEQUERIES', true ); to wp-config.php before the “That’s all, stop editing!” line.
Visitors are never affected: for anyone without the capability the plugin adds no assets, no queries and no output.
The Performance menu includes the theme setting, WordPress Core update status and a PageSpeed Insights shortcut.
Add-ons can extend the panel via the arvexa_performance_overlay_data PHP filter and the window.ArvexaPerformanceOverlay JS API.
Arvexa Performance Pro
Deep diagnostics live in the Arvexa Performance Pro add-on: full hook timeline, server cost of every AJAX/REST call (X-Arvexa-Performance header), remote HTTP tracking (see what your shipping/payment APIs cost), WP_Query explorer with SQL and EXPLAIN, per-plugin drill-down cards, layout-shift attribution per element, and performance history with before/after comparison when a plugin is installed or updated.
