test: add unit tests for performanceTracker.js

[eyeaadil]

Description

This PR addresses issue #6458 by adding a comprehensive Jest test suite for js/utils/performanceTracker.js.

The new test file (js/utils/tests/performanceTracker.test.js) includes 32 tests covering:

• Toggling the enabled/disabled state
• No-op behavior when the tracker is disabled
• Timing functions (startRun, endRun, getStats, reset)
• Depth tracking (enterBlock, exitBlock) including edge cases
• Memory tracking fallback behavior
• Console output logging logic

Test Coverage Improvement

• Statements: 0% ➔ 88.37%
• Functions: 0% ➔ 95%
• Lines: 0% ➔ 87.65%
• Tests

Related Issue

Fixes #6458

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[eyeaadil]

@walterbender If time permits you, Can You please review this PR

[mahesh-09-12]

@eyeaadil the test additions look good and improve coverage
the failing check seems to be from npm audit (path-to-regexp, picomatch, yaml). I’m noticing similar failures in other PRs as well, so this might be coming from upstream dependencies rather than this PR.

@omsuneri , is this something we should treat as a repo-level issue, or is it expected for contributors to handle within their PRs?

[mahesh-09-12]

This duplicates the existing PR (#6284) for performanceTracker.js tests and doesn't introduce any meaningful differences.
Suggest closing this to avoid duplication.

[mahesh-09-12]

Updating review based on duplicate PR.