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Finding and Fixing Ghostty's Largest Memory Leak

Jan 10, 2026·~9 minutes·1 chapter

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A few months ago, users started reporting that Ghostty was consuming absurd amounts of memory, with one user reporting 37 GB after 10 days of uptime. Today, I'm happy to say the fix has been found and merged. This post is an overview of what caused the leak, a look at some of Ghostty's internals, and some brief descriptions of how we tracked it down.

9:18

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We are not affiliated with Mitchell Hashimoto. This unofficial audio edition is available to listen to and share for free. Read the originals on mitchellh.com.

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Duration

~9 minutes (8K characters)

Release date

Jan 10, 2026