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kwakubiney 381ba9f64c encoding/binary: cache struct sizes to speed up Read and Write for slice of structs. 
A lot of allocations happen in dataSize due to reflection.

Cache the result of the function when encoding a
slice of structs similar to what is done for struct types
so that subsequent calls to dataSize can avoid allocations.

                        │   old.txt   │            new.txt            │
                        │   sec/op    │   sec/op     vs base          │
WriteSlice1000Structs-2   846.7µ ± 4%   856.4µ ± 3%  ~ (p=0.602 n=20)

                        │   old.txt    │            new.txt             │
                        │     B/s      │     B/s       vs base          │
WriteSlice1000Structs-2   84.48Mi ± 4%   83.52Mi ± 3%  ~ (p=0.602 n=20)

                        │   old.txt    │               new.txt               │
                        │     B/op     │     B/op      vs base               │
WriteSlice1000Structs-2   80.18Ki ± 0%   80.06Ki ± 0%  -0.15% (p=0.000 n=20)

                        │   old.txt   │              new.txt               │
                        │  allocs/op  │ allocs/op   vs base                │
WriteSlice1000Structs-2   16.000 ± 0%   1.000 ± 0%  -93.75% (p=0.000 n=2

                       │   old.txt   │              new.txt               │
                       │   sec/op    │   sec/op     vs base               │
ReadSlice1000Structs-2   847.4µ ± 4%   821.1µ ± 3%  -3.10% (p=0.012 n=20)

                       │   old.txt    │               new.txt               │
                       │     B/s      │     B/s       vs base               │
ReadSlice1000Structs-2   84.40Mi ± 4%   87.11Mi ± 3%  +3.20% (p=0.012 n=20)

                       │   old.txt    │               new.txt               │
                       │     B/op     │     B/op      vs base               │
ReadSlice1000Structs-2   80.12Ki ± 0%   80.00Ki ± 0%  -0.15% (p=0.000 n=20)

                       │   old.txt   │              new.txt               │
                       │  allocs/op  │ allocs/op   vs base                │
ReadSlice1000Structs-2   16.000 ± 0%   1.000 ± 0%  -93.75% (p=0.000 n=20)

Fixes #66253

Change-Id: I8227e61306db1fe103489ea4fee2429247c3debc
Reviewed-on: https://go-review.googlesource.com/c/go/+/570855
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
 		2024-03-13 18:32:53 +00:00
.github github: switch seen/expected order in issue forms 2024-01-04 23:31:17 +00:00
api net/http/httptest: add NewRequestWithContext 2024-03-11 18:09:14 +00:00
doc net/http/httptest: add NewRequestWithContext 2024-03-11 18:09:14 +00:00
lib/time lib/time: use consistent directory in mkzip usage message 2024-03-04 17:32:07 +00:00
misc misc/wasm: support new wasmtime CLI 2023-11-19 21:11:54 +00:00
src encoding/binary: cache struct sizes to speed up Read and Write for slice of structs. 2024-03-13 18:32:53 +00:00
test cmd/asm,cmd/compile: generate less instructions for most 32 bit constant adds on ppc64x 2024-03-13 13:58:44 +00:00
.gitattributes
…
.gitignore internal/platform,cmd/dist: export the list of supported platforms 2023-06-22 19:44:52 +00:00
CONTRIBUTING.md doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
LICENSE
…
PATENTS
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README.md README: update from CC-BY-3.0 to CC-BY-4.0 2022-11-02 20:14:56 +00:00
SECURITY.md SECURITY.md: update the Reporting a Vulnerability link 2023-09-22 21:17:24 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
go.env cmd/go: additional doc-inspired tests and bug fixes 2023-06-06 19:18:46 +00:00

README.md

The Go Programming Language

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