CPU & memory
About 2–4 seconds · Runs in this browser
Allocate a conservative typed-array buffer, write deterministic values, read and traverse them repeatedly, and report measured throughput, elapsed time, allocation size, and checksum. The result includes JavaScript engine and cache effects and is not raw DIMM bandwidth.
Inspect the coarse memory hint the browser exposes, then optionally run a bounded JavaScript buffer-write probe in an isolated worker.
This cannot reveal exact installed RAM, available system memory, memory frequency, or native RAM bandwidth. Results describe this browser's JavaScript allocation/write path and can change with power mode and background work.
Transparent method
This tool reports only interactions and browser APIs it can observe. It does not infer hidden hardware specifications or turn unsupported access into made-up results.
Useful context
The measurement includes the browser's JavaScript engine, bounds checks, CPU caches, memory management, and operating-system scheduling.
No. The test intentionally caps its temporary allocation to reduce crash and tab-discard risk, then releases it after completion.
Troubleshooting
Keep checking