The Go programming language https://go.dev
Find a file
Keith Randall 04807d3acf runtime/internal/maps: optimize long string keys for small maps
For large strings, do a quick equality check on all the slots.
Only if more than one passes the quick equality check do we
resort to hashing.

                               │    baseline    │             experiment              │
                               │     sec/op     │   sec/op     vs base                │
MegMap-24                        16609.50n ± 1%   13.91n ± 3%  -99.92% (p=0.000 n=10)
MegOneMap-24                     16655.00n ± 0%   12.27n ± 1%  -99.93% (p=0.000 n=10)
MegEqMap-24                         41.31µ ± 1%   25.03µ ± 1%  -39.40% (p=0.000 n=10)
MegEmptyMap-24                      2.034n ± 0%   2.027n ± 2%        ~ (p=0.541 n=10)
MegEmptyMapWithInterfaceKey-24      5.931n ± 2%   5.599n ± 1%   -5.60% (p=0.000 n=10)
MapStringKeysEight_16-24            8.473n ± 7%   8.224n ± 5%        ~ (p=0.315 n=10)
MapStringKeysEight_32-24            8.441n ± 2%   8.147n ± 1%   -3.48% (p=0.002 n=10)
MapStringKeysEight_64-24            8.769n ± 1%   8.517n ± 1%   -2.87% (p=0.000 n=10)
MapStringKeysEight_128-24           10.73n ± 4%   13.57n ± 8%  +26.57% (p=0.000 n=10)
MapStringKeysEight_256-24           12.97n ± 2%   14.35n ± 4%  +10.64% (p=0.001 n=10)
MapStringKeysEight_1M-24         17359.50n ± 3%   13.92n ± 4%  -99.92% (p=0.000 n=10)

Change-Id: I4cc2ea4edab12a4b03236de626c7bcf0f96b6cc0
Reviewed-on: https://go-review.googlesource.com/c/go/+/625905
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
2024-11-17 20:16:39 +00:00
.github .github: update language change proposal template 2024-08-08 19:02:29 +00:00
api runtime: implement AddCleanup 2024-11-16 03:26:04 +00:00
doc cmd/go: print build errors during go test -json in JSON 2024-11-17 14:32:05 +00:00
lib cmd/internal/obj/wasm: correct return PC for frameless wasmexport wrappers 2024-11-13 20:09:36 +00:00
misc misc/wasm: move wasm runtime files to lib/wasm 2024-08-30 19:15:21 +00:00
src runtime/internal/maps: optimize long string keys for small maps 2024-11-17 20:16:39 +00:00
test sync/atomic: make intrinsics noescape except 64bits op on 32bits arch and unsafe.Pointer 2024-11-15 17:11:46 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore runtime,internal: move runtime/internal/sys to internal/runtime/sys 2024-07-23 19:05:35 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
go.env cmd/go: additional doc-inspired tests and bug fixes 2023-06-06 19:18:46 +00:00
LICENSE LICENSE: update per Google Legal 2024-08-09 14:54:31 +00:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README.md README: fix CC BY license name 2024-07-22 17:45:27 +00:00
SECURITY.md SECURITY.md: update the Reporting a Vulnerability link 2023-09-22 21:17:24 +00:00

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

Gopher image Gopher image by Renee French, licensed under Creative Commons 4.0 Attribution license.

Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.

Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

Download and Install

Binary Distributions

Official binary distributions are available at https://go.dev/dl/.

After downloading a binary release, visit https://go.dev/doc/install for installation instructions.

Install From Source

If a binary distribution is not available for your combination of operating system and architecture, visit https://go.dev/doc/install/source for source installation instructions.

Contributing

Go is the work of thousands of contributors. We appreciate your help!

To contribute, please read the contribution guidelines at https://go.dev/doc/contribute.

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://go.dev/wiki/Questions for a list of places to ask questions about the Go language.