JetStream 2
The facts below are what the maker publishes about JetStream 2, checked and dated. Our editors have not written about it yet.
The facts
Each one read from JetStream 2's own pages, with the date it was checked.
What it does
- Benchmark size
- JetStream 2.2 has 64 subtests.checked 12 Oct 2026
- Changes in 2.2
- JetStream 2.2 runs the same benchmarks as 2.1 and includes fixes for minor issues, including timer resolution and segmentation subtests.checked 11 Oct 2026
- CLI or automation
- Yeschecked 22 Sep 2026
- Command line
- The maker says JetStream 2.2 includes fixes for command-line scripts used with D8 and SpiderMonkey shells.checked 12 Oct 2026
- JavaScript scoring
- Most JavaScript benchmarks score startup, worst-case, and average-case performance equally.checked 11 Oct 2026
- Overall score
- The suite combines benchmark scores using a geometric mean, with each benchmark weighted equally.checked 11 Oct 2026
- Purpose
- JetStream 2.2 is a JavaScript and WebAssembly benchmark suite focused on advanced web applications.checked 12 Oct 2026
- Score limitation
- Scores from JetStream 2.2 are not comparable to scores from other versions of JetStream.checked 12 Oct 2026
- Scoring
- It combines individual benchmark scores using a geometric mean, with each benchmark weighted equally.checked 12 Oct 2026
- Subtests
- JetStream 2.2 has 64 subtests, including a JavaScript implementation of a GPU shading language benchmark called WSL.checked 11 Oct 2026
- Version changes
- JetStream 2.2 runs the same benchmarks as 2.1 and fixes several issues, including timer resolution and task queue race conditions.checked 12 Oct 2026
- Version limitation
- Scores from JetStream 2.2 are not comparable with scores from other JetStream benchmark versions.checked 11 Oct 2026
- WebAssembly scoring
- WebAssembly benchmark scores weigh startup time and total execution time equally.checked 11 Oct 2026
- What it measures
- It rewards browsers that start up quickly, execute code quickly, and run smoothly.checked 12 Oct 2026
- Workload areas
- JavaScript,WebAssembly,Web Workers,Promises,async iteration,Unicode regular expressions,JavaScript parsing,simulationschecked 22 Sep 2026
- Workloads
- Its benchmarks cover WebAssembly, Web Workers, Promises, async iteration, Unicode regular expressions, and JavaScript parsing.checked 12 Oct 2026
Where it runs
- Browser stability
- The maker reports measuring JetStream 2.2 scores in Chrome, Safari, and Firefox and finding them as stable as JetStream 2.1.checked 12 Oct 2026
The company
- Founded
- 2019checked 4 Oct 2026
Alternatives to JetStream 2
- 1
Geekbench
Free planAndroidiOSLinuxmacOS7.8$99 one-time - 2
Blender
Free planOpen sourceLinuxmacOSWindows7.5Free plan - 3
CrossMark
Free planAndroidiOSLinuxmacOS7.5Free plan - 4
Novabench
Free planLinuxmacOSWindows7.2From $36 a year - 5
Parkdale
Free planAndroidmacOSWindows7.2Free plan - 6
Basemark GPU
Free planAndroidiOSLinuxmacOS7.1Free plan