f8f08bfd7c
Add a few more test cases for scanning (integer conversion),
which were helpful in debugging some upcoming changes.
BenchmarkScan currently times converting the value 10**N
represented in base B back into []Word form.
When B = 10, the text is 1 followed by many zeros, which
could hit a "multiply by zero" special case when processing
many digit chunks, misrepresenting the actual time required
depending on whether that case is optimized.
Change the benchmark to use 9**N, which is about as big and
will not cause runs of zeros in any of the tested bases.
The benchmark comparison below is not showing faster code,
since of course the code is not changing at all here. Instead,
it is showing that the new benchmark work is roughly the same
size as the old benchmark work.
goos: darwin
goarch: arm64
pkg: math/big
cpu: Apple M3 Pro
│ old │ new │
│ sec/op │ sec/op vs base │
ScanPi-12 43.35µ ± 1% 43.59µ ± 1% ~ (p=0.069 n=15)
Scan/10/Base2-12 202.3n ± 2% 193.7n ± 1% -4.25% (p=0.000 n=15)
Scan/100/Base2-12 1.512µ ± 3% 1.447µ ± 1% -4.30% (p=0.000 n=15)
Scan/1000/Base2-12 15.06µ ± 2% 14.33µ ± 0% -4.83% (p=0.000 n=15)
Scan/10000/Base2-12 188.0µ ± 5% 177.3µ ± 1% -5.65% (p=0.000 n=15)
Scan/100000/Base2-12 5.814m ± 3% 5.382m ± 1% -7.43% (p=0.000 n=15)
Scan/10/Base8-12 78.57n ± 2% 75.02n ± 1% -4.52% (p=0.000 n=15)
Scan/100/Base8-12 548.2n ± 2% 526.8n ± 1% -3.90% (p=0.000 n=15)
Scan/1000/Base8-12 5.674µ ± 2% 5.421µ ± 0% -4.46% (p=0.000 n=15)
Scan/10000/Base8-12 94.42µ ± 1% 88.61µ ± 1% -6.15% (p=0.000 n=15)
Scan/100000/Base8-12 4.906m ± 2% 4.498m ± 3% -8.31% (p=0.000 n=15)
Scan/10/Base10-12 73.42n ± 1% 69.56n ± 0% -5.26% (p=0.000 n=15)
Scan/100/Base10-12 511.9n ± 1% 488.2n ± 0% -4.63% (p=0.000 n=15)
Scan/1000/Base10-12 5.254µ ± 2% 5.009µ ± 0% -4.66% (p=0.000 n=15)
Scan/10000/Base10-12 90.22µ ± 2% 84.52µ ± 0% -6.32% (p=0.000 n=15)
Scan/100000/Base10-12 4.842m ± 3% 4.471m ± 3% -7.65% (p=0.000 n=15)
Scan/10/Base16-12 62.28n ± 1% 58.70n ± 1% -5.75% (p=0.000 n=15)
Scan/100/Base16-12 398.6n ± 0% 377.9n ± 1% -5.19% (p=0.000 n=15)
Scan/1000/Base16-12 4.108µ ± 1% 3.782µ ± 0% -7.94% (p=0.000 n=15)
Scan/10000/Base16-12 83.78µ ± 2% 80.51µ ± 1% -3.90% (p=0.000 n=15)
Scan/100000/Base16-12 5.080m ± 3% 4.698m ± 3% -7.53% (p=0.000 n=15)
geomean 12.41µ 11.74µ -5.36%
Change-Id: If3ce290ecc7f38672f11b42fd811afb53dee665d
Reviewed-on: https://go-review.googlesource.com/c/go/+/650639
Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Russ Cox <rsc@golang.org>
|
||
|---|---|---|
| .github | ||
| api | ||
| doc | ||
| lib | ||
| misc | ||
| src | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| CONTRIBUTING.md | ||
| LICENSE | ||
| PATENTS | ||
| README.md | ||
| SECURITY.md | ||
| codereview.cfg | ||
| go.env | ||
README.md
The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
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.