Migrate b.N benchmark loops to b.Loop()#5305
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Bump Go to `go1.26.0` / `toolchain go1.26.3` across all four modules. This cleans up an inconsistency: `go.mod`, `tools/task/go.mod`, and `bundle/internal/tf/codegen/go.mod` were sitting at `go 1.25.8` while `tools/go.mod` had drifted back to `go 1.25.0`. All four are now in sync. Release notes: https://go.dev/doc/go1.26 Co-authored-by: Isaac
Bumping the `go` directive to 1.26.0 unlocks two modernize analyzers that
were silent on 1.25:
* stditerators - prefer reflect.Type.Fields()/Methods() and
reflect.Value.Fields()/Methods() over the classic
NumField()/Field(i) loop pattern.
* newexpr - replace local `*T` helpers like `func intPtr(v int) *int
{ return &v }` (and their callers) with Go 1.26's `new(expr)`.
This commit is the verbatim output of `golangci-lint run --fix ./...`,
applied at the same time as the toolchain bump so CI doesn't fail the
moment the bump lands.
A few `field := field` style redeclarations the fixer leaves behind are
harmless (the loop variable is fresh per-iteration since Go 1.22). Leaving
those for a follow-up cleanup rather than expanding the diff here.
Co-authored-by: Isaac
Follow-up to the previous commit, which the previous commit message
deferred. Two cosmetic clean-ups:
1. Remove 14 redundant `x := x` redeclarations the modernize fixer left
inside `for x := range t.Fields()` (or `.Methods()`) loops. The loop
variable is already fresh per-iteration since Go 1.22, so the shadow
was a no-op kept only to preserve the variable name from the old
`field := t.Field(i)` pattern.
2. Remove dead `*Ptr` helper functions whose call sites were inlined to
`new(expr)`. The fixer added `//go:fix inline` directives and rewrote
the bodies to `return new(v)`, leaving the functions themselves with
zero callers (except `int64Ptr`, where `new(700)` would yield `*int`
instead of `*int64`; here we rewrite the 20 callers to
`new(int64(N))` and drop the helper too).
* bundle/docsgen/nodes_test.go: drop strPtr
* libs/apps/runlocal/spec_test.go: drop stringPtr
* libs/structs/structaccess/convert_test.go: drop stringPtr, intPtr,
float64Ptr, boolPtr
* cmd/pipelines/history_test.go: rewrite int64Ptr callers, drop helper
Co-authored-by: Isaac
Co-authored-by: Isaac
testing.B.Loop() was added in Go 1.24 with a performance regression that made it prevent inlining; that was fixed in Go 1.26. There's no longer any reason to use 'for i := 0; i < b.N; i++' — b.Loop() handles the loop counter, correct keep-alive semantics, and timer setup automatically. This commit adds the rule only; lint will fail on existing benchmarks. The follow-up commit migrates them. Co-authored-by: Isaac
b.Loop() was added in Go 1.24 but had an inlining regression that's fixed in Go 1.26. The new form is strictly better: automatic timer setup, correct keep-alive of the loop body, and inlineable. b.ResetTimer() calls immediately before the loop are no longer needed. Co-authored-by: Isaac
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Commit: 47518e6 |
denik
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May 21, 2026
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nit: would be nice to include as a comment output of before and after, since these are manually run.
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Stacked on top of #5302.
Go 1.26 fixed the inlining regression that made
b.Loop()worse thanb.Non 1.24/1.25. Migrates the 4 remaining loops and adds a ruleguard rule. Redundantb.ResetTimer()/b.StopTimer()around each loop are removed too.This pull request and its description were written by Isaac.