Quick Answer
Our CPU benchmark test tool is a browser-based utility at /run/ that measures single-core throughput, multi-core throughput, normalized scores, and stability using configurable Web Worker workloads.
Formula
Result Set = { singleCoreScore, multiCoreScore, throughput, stability%, duration, intensity, threadMode }
Introduction
You do not need to download Prime95 or sign up for an account to measure processor performance. Our tool runs entirely in the browser, stores nothing on a server, and exports JSON you can archive for upgrade comparisons.
Visit the CPU benchmark test site for methodology articles, or jump straight into this CPU benchmark test tool guide walkthrough to learn every control before your first run.
What is the CPU benchmark test tool?
The tool is a live dashboard at /run/ with intensity slider, duration picker, workload type selector, and thread mode options. When you start a test, compute kernels execute on the main thread and in Web Workers while metrics update in real time.
Results appear in the live metrics panel and a results modal when the run completes. You can export JSON containing all settings and scores for reproducible comparisons.
Understanding how CPU benchmark tests work behind the scenes helps you choose intensity and duration. First-time users should start moderate for two minutes, then scale up once baseline numbers look stable.
Metrics the tool calculates
The engine tracks operations completed per second during each phase, then maps throughput to normalized 0-100 scores for single-core and multi-core performance separately.
Stability samples throughput every few seconds. If scores drift down as the chip heats up, stability percentage falls even when peak throughput looked strong.
Displayed Score = normalize(opsPerSecond) per phase; Total Throughput = sum(worker ops) + main thread ops
- Integer workload: prime sieve style loops
- Float workload: matrix multiplication kernels
- Mixed workload: alternates integer and float stress
- Crypto workload: hashing-style compute patterns
Step-by-step: using the benchmark tool
Complete walkthrough from opening the page to exporting results.
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Open /run/
Load the benchmark page in a modern Chromium, Firefox, or Safari browser.
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Review system specs
The panel shows detected logical cores and browser info. Verify core count looks correct.
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Set intensity (1-40)
Start at 10-15 for laptops, 20+ for desktops. Higher values use larger matrices and more workers.
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Pick duration
60 seconds for a quick check; 300 seconds for stability and thermal behavior.
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Choose workload and thread mode
Mixed + Auto is the default balanced profile. Use Single for gaming relevance or Multi for productivity.
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Start, stop, export
Click Start Test. When finished, open the results modal and export JSON. Compare files over time or across PCs.
Example benchmark session and interpretation
A user on a Ryzen desktop runs Mixed workload, intensity 25, duration 180s, Auto mode. Results: single-core 82, multi-core 96, stability 93%, throughput 3.4M ops/s.
They export JSON, upgrade GPU only, and retest a week later. CPU scores match within 2%, confirming the GPU swap did not affect processor metrics. They then test an old laptop for comparison and share both JSON files in a spreadsheet.
For broader context on what those numbers mean in gaming vs editing, read CPU benchmark examples by use case and CPU benchmark scores explained after your first export.
FAQ
- Is the tool safe for work laptops?
- Yes. It runs standard compute workloads. IT policies allowing web browsing generally allow this test. High intensity may spin fans loudly.
- Are results uploaded?
- No. Everything runs locally unless you manually share an export file.
- Which browser is best?
- Use the same browser for all comparisons on a given machine. Different engines produce slightly different JavaScript throughput.
Conclusion
Our CPU benchmark test tool delivers instant single-core, multi-core, and stability metrics with no install.
Use consistent settings, export JSON, and compare against your own baselines for meaningful upgrade decisions.
Open the Benchmark Tool