favor the constructor of the performance instance if it exists

[zbyte64]

Purpose

Fix issue #420 by favoring the constructor of the performance instance over the Performance class

Background

jsdom also patches the Performance class and doesn't implement all of the methods.

I could not use the workaround mentioned: #394 (comment) because I'm using vitest with jsdom as the environment.

Solution

This simply favors the prototype of the performance instance, since that seems to be untouched by jsdom.

[codecov]

Codecov Report

Patch coverage: 50.00% and no project coverage change.

Comparison is base (b568150) 96.47% compared to head (4982ed0) 96.47%.

❗ Current head 4982ed0 differs from pull request most recent head 0fdc0ad. Consider uploading reports for the commit 0fdc0ad to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #478   +/-   ##
=======================================
  Coverage   96.47%   96.47%           
=======================================
  Files           2        2           
  Lines         680      680           
=======================================
  Hits          656      656           
  Misses         24       24           

Flag	Coverage Δ
unit	96.47% <50.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
src/fake-timers-src.js	96.49% <50.00%> (ø)

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.