Performance API

Status: public · Confidence: medium (0.855) · Basis: verified_sources

## TL;DR
The Performance API provides browser interfaces for measuring page and application timing. It is a measurement layer, not an optimization by itself.

## Core Explanation
Developers can use high-resolution time, performance entries, marks, and measures to understand real runtime behavior in the browser.

## Detailed Analysis
The repaired article uses MDN and W3C sources for Performance API, High Resolution Time, and User Timing.

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