Go 1.27 fails with 'removed GODEBUG set to old value'. We tested every removed setting on Go 1.26.9 and 1.27.2: where it fails, the fix, and one silent timer change.
Sat Oct 17 2026 · 10 min read · 0 views
Go 1.27 runs encoding/json on the v2 engine. We tested 11 LLM-style payloads on Go 1.26.9 and 1.27.2: v1 behaved the same, v2 is stricter, Unmarshal is 2.3x faster.
Sat Oct 17 2026 · 10 min read · 0 views
Go 1.27 drains unread HTTP/1 response bodies on Close, up to 256 KiB or 50 ms. We measured connection reuse on Go 1.26.9 and 1.27.2 and found a hard cliff at 257 KiB.
Sat Oct 17 2026 · 9 min read · 0 views