Browser micro-benchmark
Honest scope: this is a tiny synthetic micro-benchmark in JavaScript. It does not measure your Wi‑Fi, GPU or disk — only how fast this tab runs three tight loops today. Compare runs on the same device only.
Key takeaways
- Three tiny workloads stress CPU-bound JS in this tab only.
- Median aggregation reduces one-off GC spikes a little.
- Compare before/after disabling heavy extensions on the same laptop.
- Not comparable across phone vs desktop — different chips entirely.
- Pair with real app profiling when a production page feels slow.
Who built this
ContractorHQ is edited by Bernard Guido — 25+ years in trade operations and software. These utilities follow the same quality bar as our reviews: fast pages, honest disclosure, and tools that stay useful without selling your data.
Frequently asked questions
Can I brag about the score online?
Not usefully. Different browsers, extensions, battery saver and thermal limits change numbers. Use it to see if something suddenly got slower on the same machine.
Does this test my internet?
No. Everything stays in-process. Network speed is unrelated.
Why median of several runs?
JavaScript engines warm up and garbage collection can hitch. Taking the median of a few back-to-back runs smooths single spikes a bit.
Is this a security scanner?
No. It only runs arithmetic and string work you triggered. It does not read files or scan your network.