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Brendan Gregg

What Brendan Gregg thinks about benchmarks

@brendan-gregg · 17 positions · On ppll ↗

Computer performance engineer working on datacenter performance at OpenAI, previously Netflix and Sun/Joyent. Author of Systems Performance and BPF Performance Tools, and creator of flame graphs.

Brendan Gregg did not write this page.

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Only Brendan Gregg on benchmarks. See everyone on benchmarks

2 dated positions, 2025, in their own words. Our reading of what Brendan Gregg has said — not written or endorsed by them.

2 positions so far — this page is not yet offered to search engines.

  1. Our readingFair hardware benchmarks must use the best software and tuning for each hardware option, not hardware specs alone.

    Their wordsThe most accurate and realistic evaluation for HW involves selecting the best software and then tuning it, and doing this for all HW options.

    ↗Third Stage Engineeringbrendangregg.com 2nd of 2 in this piece

  2. 3 months earlier

  3. Our readingA performance test without an explanation of its limiting factor should be treated as unanalyzed and possibly bogus.

    Their wordsAny performance test should be accompanied by an explanation of the limiting factor, since no explanation will reveal the test wasn't analyzed and the result may be bogus.

    ↗When to Hire a Computer Performance Engineering Team (2025) part 1 of 2brendangregg.com 3rd of 3 in this piece