About JavaScript Performance Benchmark
This tool benchmarks JavaScript in-browser across function timing, algorithm comparison, memory trend, rendering, and async scenarios.
Key Features
- Multiple Test Modes: Function, algorithm, memory, rendering, async.
- Configurable Params: Iterations, warmup, and data size.
- Metric Summary: Avg/min/max time and throughput indicators.
- Charts: Distribution, comparison, and memory trend visuals.
- Export + Suggestions: Clear/export results and review hints.
Steps
- Select test mode and preset.
- Configure iterations/warmup/data size.
- Paste benchmark code and run.
- Inspect metrics, charts, and suggestions.
Use Cases
- Comparing algorithm implementations.
- Measuring performance before/after refactor.
- Detecting rendering or async bottlenecks.
FAQ
Why do results vary between runs?
Browser scheduling, JIT warm-up, and system load all affect timing. Run multiple times and compare median trends.
Can browser benchmark replace production load testing?
Not fully. It is great for quick comparison, while production conclusions need real-environment validation.