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benchmark: add benchmark for buf.compare() #5441

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@Trott Trott commented Feb 26, 2016

There is a benchmark for the class method Buffer.compare() but not for
the instance method buf.compare(). This adds that benchmark.

I used this to confirm a performance regression in an implementation I
was considering. While the implementation was a bust, it does seem like
the benchmark is worthwhile.

The benchmark is nearly identical to the existing Buffer.compare()
benchmark except, of course, that it calls buf.compare() instead.

There is a benchmark for the class method `Buffer.compare()` but not for
the instance method `buf.compare()`. This adds that benchmark.

I used this to confirm a performance regression in an implementation I
was considering. While the implementation was a bust, it does seem like
the benchmark is worthwhile.

The benchmark is nearly identical to the existing `Buffer.compare()`
benchmark except, of course, that it calls `buf.compare()` instead.
@Trott Trott added buffer Issues and PRs related to the buffer subsystem. benchmark Issues and PRs related to the benchmark subsystem. lts-watch-v4.x labels Feb 26, 2016
var b1 = new Buffer(size).fill('a');

b1[size - 1] = 'b'.charCodeAt(0);

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Please insert code to force optimization of b0.compare before starting the benchmark. Take a look at some of the other (e.g. path) benchmarks to see how to do this.

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Trott commented Feb 26, 2016

  • const-ified per @evanlucas
  • added a force-optimization (or tried to, copy-pasting mostly) per @mscdex

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LGTM

b1[size - 1] = 'b'.charCodeAt(0);

// Force optimization before starting the benchmark
b0.compare(b0, b1);
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This and the other instance below should instead be b0.compare(b1);

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Trott commented Feb 26, 2016

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mscdex commented Feb 26, 2016

LGTM

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Trott commented Feb 28, 2016

Trott added a commit to Trott/io.js that referenced this pull request Feb 28, 2016
There is a benchmark for the class method `Buffer.compare()` but not for
the instance method `buf.compare()`. This adds that benchmark.

I used this to confirm a performance regression in an implementation I
was considering. While the implementation was a bust, it does seem like
the benchmark is worthwhile.

The benchmark is nearly identical to the existing `Buffer.compare()`
benchmark except, of course, that it calls `buf.compare()` instead.

PR-URL: nodejs#5441
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Evan Lucas <evanlucas@me.com>
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Trott commented Feb 28, 2016

Landed in ffdc046

@Trott Trott closed this Feb 28, 2016
@Fishrock123 Fishrock123 mentioned this pull request Mar 1, 2016
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Fishrock123 pushed a commit that referenced this pull request Mar 2, 2016
There is a benchmark for the class method `Buffer.compare()` but not for
the instance method `buf.compare()`. This adds that benchmark.

I used this to confirm a performance regression in an implementation I
was considering. While the implementation was a bust, it does seem like
the benchmark is worthwhile.

The benchmark is nearly identical to the existing `Buffer.compare()`
benchmark except, of course, that it calls `buf.compare()` instead.

PR-URL: #5441
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Evan Lucas <evanlucas@me.com>
MylesBorins pushed a commit that referenced this pull request Mar 17, 2016
There is a benchmark for the class method `Buffer.compare()` but not for
the instance method `buf.compare()`. This adds that benchmark.

I used this to confirm a performance regression in an implementation I
was considering. While the implementation was a bust, it does seem like
the benchmark is worthwhile.

The benchmark is nearly identical to the existing `Buffer.compare()`
benchmark except, of course, that it calls `buf.compare()` instead.

PR-URL: #5441
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Evan Lucas <evanlucas@me.com>
MylesBorins pushed a commit that referenced this pull request Mar 21, 2016
There is a benchmark for the class method `Buffer.compare()` but not for
the instance method `buf.compare()`. This adds that benchmark.

I used this to confirm a performance regression in an implementation I
was considering. While the implementation was a bust, it does seem like
the benchmark is worthwhile.

The benchmark is nearly identical to the existing `Buffer.compare()`
benchmark except, of course, that it calls `buf.compare()` instead.

PR-URL: #5441
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Evan Lucas <evanlucas@me.com>
@Trott Trott deleted the benchmark-instance branch January 13, 2022 22:42
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4 participants