Skip to content
SPECIFICTION
Get listed

JetStream 2

browserbench.org

Web
Visit browserbench.org
Spec score 6.9 #64 of 73 in PC Benchmark Software

Spec sheet

Purpose
JetStream 2.2 is a JavaScript and WebAssembly benchmark suite focused on advanced web applications.Read 12 Oct 2026 · browserbench.org
Founded
2019Read 4 Oct 2026 · browserbench.org
Benchmark size
JetStream 2.2 has 64 subtests.Read 12 Oct 2026 · browserbench.org
Browser stability
The maker reports measuring JetStream 2.2 scores in Chrome, Safari, and Firefox and finding them as stable as JetStream 2.1.Read 12 Oct 2026 · webkit.org
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.Read 11 Oct 2026 · browserbench.org
CLI or automation
YesRead 22 Sep 2026 · browserbench.org
Command line
The maker says JetStream 2.2 includes fixes for command-line scripts used with D8 and SpiderMonkey shells.Read 12 Oct 2026 · browserbench.org
JavaScript scoring
Most JavaScript benchmarks score startup, worst-case, and average-case performance equally.Read 11 Oct 2026 · browserbench.org
Overall score
The suite combines benchmark scores using a geometric mean, with each benchmark weighted equally.Read 11 Oct 2026 · browserbench.org
Score limitation
Scores from JetStream 2.2 are not comparable to scores from other versions of JetStream.Read 12 Oct 2026 · browserbench.org
Scoring
It combines individual benchmark scores using a geometric mean, with each benchmark weighted equally.Read 12 Oct 2026 · browserbench.org
Subtests
JetStream 2.2 has 64 subtests, including a JavaScript implementation of a GPU shading language benchmark called WSL.Read 11 Oct 2026 · browserbench.org
Version changes
JetStream 2.2 runs the same benchmarks as 2.1 and fixes several issues, including timer resolution and task queue race conditions.Read 12 Oct 2026 · browserbench.org
Version limitation
Scores from JetStream 2.2 are not comparable with scores from other JetStream benchmark versions.Read 11 Oct 2026 · browserbench.org
WebAssembly scoring
WebAssembly benchmark scores weigh startup time and total execution time equally.Read 11 Oct 2026 · browserbench.org
What it measures
It rewards browsers that start up quickly, execute code quickly, and run smoothly.Read 12 Oct 2026 · browserbench.org
Workload areas
JavaScript,WebAssembly,Web Workers,Promises,async iteration,Unicode regular expressions,JavaScript parsing,simulationsRead 22 Sep 2026 · browserbench.org
Workloads
Its benchmarks cover WebAssembly, Web Workers, Promises, async iteration, Unicode regular expressions, and JavaScript parsing.Read 12 Oct 2026 · browserbench.org

Where Specifiction places it

Alternatives to JetStream 2All alternatives →