Simon Willison’s Weblog

Mac OS X Leopard: UNIX. Leopard ships with DTrace, and it’s been hooked in to Java, Ruby, Python and Perl.

Posted 11th June 2007 at 11:05 pm

Recent articles

Claude Code for web - a new asynchronous coding agent from Anthropic - 20th October 2025
Getting DeepSeek-OCR working on an NVIDIA Spark via brute force using Claude Code - 20th October 2025
Claude Skills are awesome, maybe a bigger deal than MCP - 16th October 2025

dtrace 2 java 89 leopard 14 osx 80 perl 26 python 1198 ruby 72

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