Perf improvements#184
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Signed-off-by: Jonathan Stacks <jonstacks@users.noreply.github.com>
Avoid fmt's reflection dispatch and internal buffering in hot paths:
- formatLogfmtValue: expand combined integer case into per-type strconv
calls (FormatInt/FormatUint/Itoa) instead of fmt.Sprintf("%d", value)
- TerminalFormat/logfmt: replace fmt.Fprintf into *bytes.Buffer with
explicit WriteString/WriteByte calls
Benchmarks show: TerminalFormat -47% ns/op and -4 allocs/op with no
context; with integer context -55% ns/op and -11 allocs/op. Logfmt
integer formatting -19% ns/op and -2 allocs/op.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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While working on a slog shim for log15, claude and I found some small performance improvements that look mostly straightforward.
LogfmtNoCtxLogfmtWithIntCtxLogfmtWithMixedCtxTerminalFormatNoCtxTerminalFormatWithIntCtxLog15AddingFields