Benchmark Builder

Benchmark Builder. Compare and analyze execution time of multiple benchmark suites with statistical analysis — mean, variance, and relative performance. Build and compare benchmarks visually with our free online benchmark builder.

Enter execution time measurements across multiple test suites, and instantly see statistical analysis including average (mean) and variance for each suite.

Ranked results show which implementation performs best, with delta and ratio comparisons against the fastest suite. Perfect for comparing algorithm implementations, library choices, or any performance measurements.

Our benchmark analysis tool makes it easy to document and share performance data. Export results as a formatted Markdown table ready for GitHub pull requests and issues, or as a bullet list for reports and wikis.

Supports any unit (ms, seconds, ops/s) and unlimited sample sizes per suite. All calculation happens locally in your browser with no data leaving your machine. Related tools include the Chmod calculator, Cron expression generator, and UUID generator.

Whether you are doing a performance comparison between sorting algorithms, testing HTTP client libraries, or analyzing database query times, this tool provides a clean workflow.

Add multiple measurement samples per suite to reduce noise, reset or reorganize suites freely, and get reliable statistical results in seconds.

The tool is ideal for developers who need a quick, lightweight performance testing tool without setting up a full benchmarking framework.

Frequently asked questions

How do I compare benchmark results with this tool?

Give each suite a name, type one measurement per field under Suite values (press Enter to add the next one) and optionally set a Unit such as ms. The results table ranks suites by average, lowest first, and lists the number of samples, the average and the variance. Add suite and Delete suite change how many suites you compare.

What do the + value and x ratio next to the average mean?

For every suite except the top-ranked one, the tool shows how much higher its average is than the best average (+ delta in your unit) and how many times higher it is (x ratio). For example, averages of 10 ms and 15 ms show 15ms (+5ms ; x1.5) for the second suite.

Can I use ops/s or other higher-is-better metrics?

You can type any unit, but ranking always puts the lowest average first, which suits durations such as ms or s. For throughput numbers such as ops/s, where higher is better, read the table from the bottom up or enter the inverse values.

How do I export the benchmark results?

Click Copy as Markdown table to copy a table ready for GitHub pull requests, issues or docs, or Copy as bullet list for chat messages and wikis. Both contain the same position, suite, samples, average and variance as the on-screen table.

Is the variance a sample or population variance?

It is the population variance: the average of the squared differences from the mean, divided by the number of samples. Empty fields are ignored, and results are rounded to three decimals.

Are my suites saved?

Yes, the suites and unit are saved in your browser's local storage, so they are still there when you come back. Reset suites empties them, and nothing is sent to a server.

How to use this online tool

Benchmark Builder is designed for fast browser workflows when you need to format, validate, convert, decode, encode, generate, or inspect data without opening a heavy desktop app. Start with the input field or visible options, review the result, then copy or download the output for the next step.

Private processing in your browser

Benchmark Builder keeps the normal processing step local in your browser. That is useful for code snippets, tokens, documents, configuration values, text samples, and other material that should not be sent to a remote service unless you explicitly choose to share it.

When this tool is useful

Use Benchmark Builder for repeatable developer tasks, technical documentation, QA checks, quick conversions, debugging, content cleanup, and internal team workflows. The page focuses on clear inputs, immediate feedback, and output that is easy to reuse in code, reports, tickets, emails, or notes.

Practical tips

Before copying the final result, check important details such as spacing, casing, filenames, encoding, token structure, line breaks, or output format. Small checks prevent mistakes when the result is reused in source code, API requests, documentation, spreadsheets, or shared files.