What Russ Cox thinks about developer tools

@russ-cox · 7 positions · On ppll ↗

Software engineer and a long-time technical lead of the Go programming language; author of plan9port and of the research.swtch.com essays.

Russ Cox did not write this page.

We collected these quotes from things they published elsewhere, and every quote links to where it was said. They have no account here and have not endorsed this site. Quotes are word for word; the short line under each one is our own restatement, not their wording. Their own site. Is this you? Claim it or ask us to remove it. Or tell us what is wrong here.

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Only Russ Cox on developer tools. See everyone on developer tools

1 dated position, 2025, in their own words. Our reading of what Russ Cox has said — not written or endorsed by them.

1 position so far — this page is not yet offered to search engines.

25 Apr 2025

Our readingComparing code coverage between passing and failing test runs is a cheap, effective way to localize a bug quickly.

Their wordsDifferential coverage is cheap to compute and display, and when it's right, it can save a lot of time.

↗Differential Coverage for Debuggingresearch.swtch.com 1st of 2 in this piece