Compare JavaScript runtime performance across browser, Node.js, Deno, Bun, V8, and QuickJS with shareable jsPerf benchmark pages and deep analysis.
Cross-runtime comparisons are most useful when code is sensitive to engine or platform behavior.
Compare parsing, formatting, crypto-adjacent helpers, data transformations, and hot loop behavior.
Check whether a Node.js optimization still wins in Deno, Bun, or browser environments.
Use runtime results to guide deployment decisions only after validating the real workload shape.
The same benchmark page can collect multiple views of the same code.
Browser benchmarks show frontend behavior where user code executes.
QuickJS-WASM gives a deterministic no-JIT baseline for algorithmic cost.
V8 microVM and worker results add JIT and runtime-specific signals.
Short answers for searchers, with enough context to help them create a better benchmark.
Yes. When the optional benchmark worker is configured, jsPerf can run snippets in Node.js, Deno, and Bun and show runtime comparison results alongside browser benchmarks.
Runtime behavior can differ because engines, JIT warmup, native APIs, module handling, and memory behavior are not identical across Node.js, Deno, Bun, browsers, and QuickJS.
Not exactly. Node.js uses V8, but Node adds runtime APIs, event loop behavior, and process-level characteristics. jsPerf separates canonical V8 analysis from runtime worker results.
No. Runtime versions change quickly. Treat a benchmark as evidence for a specific snippet, environment, and version, then rerun it when engines or code change.
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