go/src/encoding/json/decode.go, branch makepkg

encoding/json: realign struct UnmarshalTypeError and decodeState

2026-02-03T11:04:30Z

This reduce the UnmarshalTypeError size from 64 to 56 bytes (-8 bytes), and decodeState from 128 to 96 (-32 bytes).

encoding/json: remove unneeded unsafe import

2026-01-22T22:29:44Z

Followon for CL 721160. Change-Id: I9c22c5e99c9084e24047c77d20717c5b46165cde Reviewed-on: https://go-review.googlesource.com/c/go/+/732220 Reviewed-by: Carlos Amedee Reviewed-by: Michael Pratt Reviewed-by: Sean Liao LUCI-TryBot-Result: Go LUCI

encoding/json: remove linknames

2025-11-20T22:04:37Z

The linknames have been removed in the latest commits: isValidNumber, typeFields: https://github.com/bytedance/sonic/commit/908af5dfaf7d509db1f2c2b1c43f4df728db80a6 unquoteBytes: https://github.com/bytedance/sonic/commit/8e9090a84be10962046197f1867d297d3e73020a For #67401 Change-Id: I30b057137932fcf267014ab5470c417298765249 Reviewed-on: https://go-review.googlesource.com/c/go/+/721160 LUCI-TryBot-Result: Go LUCI Reviewed-by: Joseph Tsai Reviewed-by: Junyang Shao Reviewed-by: Mark Freeman

encoding/json: use reflect.TypeAssert

2025-09-10T00:22:28Z

Updates #62121 Change-Id: Ic3c4fe84a5dacfd8270aba0d5dd59f83f0a9030f Reviewed-on: https://go-review.googlesource.com/c/go/+/701955 Reviewed-by: Mark Freeman Reviewed-by: Damien Neil LUCI-TryBot-Result: Go LUCI

unicode/utf8: make DecodeRune{,InString} inlineable

2025-09-03T14:04:47Z

This change makes the fast path for ASCII characters inlineable in DecodeRune and DecodeRuneInString and removes most instances of manual inlining at call sites. Here are some benchmark results (no change to allocations): goos: darwin goarch: amd64 pkg: unicode/utf8 cpu: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz │ old │ new │ │ sec/op │ sec/op vs base │ DecodeASCIIRune-8 2.4545n ± 2% 0.6253n ± 2% -74.52% (p=0.000 n=20) DecodeJapaneseRune-8 3.988n ± 1% 4.023n ± 1% +0.86% (p=0.050 n=20) DecodeASCIIRuneInString-8 2.4675n ± 1% 0.6264n ± 2% -74.61% (p=0.000 n=20) DecodeJapaneseRuneInString-8 3.992n ± 1% 4.001n ± 1% ~ (p=0.625 n=20) geomean 3.134n 1.585n -49.43% Note: when #61502 gets resolved, DecodeRune and DecodeRuneInString should be reverted to their idiomatic implementations. Fixes #31666 Updates #48195 Change-Id: I4be25c4f52417dc28b3a7bd72f1b04018470f39d GitHub-Last-Rev: 2e352a0045027e059be79cdb60241b5cf35fec71 GitHub-Pull-Request: golang/go#75181 Reviewed-on: https://go-review.googlesource.com/c/go/+/699675 Reviewed-by: Sean Liao LUCI-TryBot-Result: Go LUCI Reviewed-by: Cherry Mui Reviewed-by: Michael Pratt

encoding/json: add security section to doc

2025-06-27T20:38:47Z

Add a section to the package doc which details the security considerations of using encoding/json, in particular with respect to parser misalignment issues. Additionally, clarify previously ambiguous statement in the Unmarshal doc about how case is used when matching keys in objects, and add a note about how duplicate keys are handled. Fixes #14750 Change-Id: I66f9b845efd98c86a684d7333b3aa8a456564922 Reviewed-on: https://go-review.googlesource.com/c/go/+/684315 LUCI-TryBot-Result: Go LUCI Reviewed-by: Joseph Tsai Auto-Submit: Roland Shoemaker Reviewed-by: Damien Neil

encoding/json: add json/v2 with GOEXPERIMENT=jsonv2 guard

2025-04-18T15:24:07Z

This imports the proposed new v2 JSON API implemented in github.com/go-json-experiment/json as of commit d3c622f1b874954c355e60c8e6b6baa5f60d2fed. When GOEXPERIMENT=jsonv2 is set, the encoding/json/v2 and encoding/jsontext packages are visible, the encoding/json package is implemented in terms of encoding/json/v2, and the encoding/json package include various additional APIs. (See #71497 for details.) When GOEXPERIMENT=jsonv2 is not set, the new API is not present and the encoding/json package is unchanged. The experimental API is not bound by the Go compatibility promise and is expected to evolve as updates are made to the json/v2 proposal. The contents of encoding/json/internal/jsontest/testdata are compressed with zstd v1.5.7 with the -19 option. Fixes #71845 For #71497 Change-Id: Ib8c94e5f0586b6aaa22833190b41cf6ef59f4f01 Reviewed-on: https://go-review.googlesource.com/c/go/+/665796 Auto-Submit: Damien Neil LUCI-TryBot-Result: Go LUCI Reviewed-by: Michael Pratt Reviewed-by: Joseph Tsai Reviewed-by: Dmitri Shuralyov

encoding/json: remove suggestion on Unmarshaler with JSON null

2024-12-30T20:21:48Z

It is not true that Unmarshal always treats a JSON null as being equivalent to a no-op. For bools, ints, uints, floats, strings, arrays, and structs, it treats a JSON null as a no-op. However, for []byte, slice, map, pointer, or interface, it zeros the underlying value. Remove this suggestion as the actual behavior is inconsistent. Note that the proposed behavior in v2 Unmarshal is to consistently zero out the underlying value. Change-Id: I02cef0bf7919f25cfd0aceb04486d37498761181 Reviewed-on: https://go-review.googlesource.com/c/go/+/638416 Reviewed-by: Dmitri Shuralyov TryBot-Result: Gopher Robot LUCI-TryBot-Result: Go LUCI Reviewed-by: Ian Lance Taylor Run-TryBot: Joseph Tsai

encoding/json, text/template: use reflect.Value.Equal instead of ==

2024-11-08T16:09:21Z

This change applies a fix for a reflect.Value incorrect comparison using "==" or reflect.DeepEqual. This change is a precursor to the change that'll bring in the static analyzer "reflectvaluecompare", by ensuring that all tests pass beforehand. Updates #43993 Change-Id: I6c47eb0a1de6353ac7495cb8cb49b318b7ebba56 Reviewed-on: https://go-review.googlesource.com/c/go/+/626116 LUCI-TryBot-Result: Go LUCI Reviewed-by: Ian Lance Taylor Auto-Submit: Ian Lance Taylor Run-TryBot: Emmanuel Odeke TryBot-Result: Gopher Robot Reviewed-by: David Chase

encoding/json: add embedded structs to the UnmarshalTypeError's Field

2024-09-03T15:49:47Z

Including embedded struct inforamtion in error message. Fixes #68941 Change-Id: I6a6f7d506104839a9a7cf1a2c3003272f5534a79 GitHub-Last-Rev: 717f680acafd3f6509c0495f9092e028be502750 GitHub-Pull-Request: golang/go#68966 Reviewed-on: https://go-review.googlesource.com/c/go/+/606956 LUCI-TryBot-Result: Go LUCI Auto-Submit: Ian Lance Taylor Reviewed-by: Ian Lance Taylor Reviewed-by: Dmitri Shuralyov