Fix perf script for object hooks

[lukastaegert]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

Description

This is just a small improvement for the perf option to not fail when object hooks are used. Also fixes some issues with the perf script.

[github-actions]

Thank you for your contribution! ❤️

You can try out this pull request locally by installing Rollup via

npm install rollup/rollup#fix-perf

or load it into the REPL:
https://rollupjs.org/repl/?pr=4707

[codecov]

Codecov Report

Merging #4707 (609879a) into master (7307bfa) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #4707   +/-   ##
=======================================
  Coverage   99.02%   99.02%           
=======================================
  Files         215      215           
  Lines        7593     7597    +4     
  Branches     2105     2106    +1     
=======================================
+ Hits         7519     7523    +4     
  Misses         24       24           
  Partials       50       50           

Impacted Files	Coverage Δ
src/utils/timers.ts	92.72% <100.00%> (+0.57%)	⬆️

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[rollup-bot]

This PR has been released as part of rollup@3.3.0. You can test it via npm install rollup.