* Speed up buffer.swap16 and swap32 by using builtins. Up to ~6x gain.
Drop transition point between JS and C++ implementations accordingly.
Amount of performance improvement not only depends on buffer size but
also memory alignment.
* Fix tests: C++ impl tests were testing 0-filled buffers so were
always passing.
* Add similar buffer.swap64 method.
* Make buffer-swap benchmark mirror JS impl.
doc/api/buffer.markdown has an entry of "added: REPLACEME" that should
be changed to the correct release number before tagged.
Because node is currently using a very old version of cpplint.py it
doesn't know that std::swap() has moved from <algorithm> to <utility> in
c++11. So until cpplint.py is updated simply NOLINT the line.
Technically it should be NOLINT(build/include_what_you_use), but that
puts the line over 80 characters causing another lint error.
PR-URL: https://github.com/nodejs/node/pull/7157
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
To copy the values of all enumerable own properties from-
a source object to a target object, node still use-
`util._extend`, though newer standard `Object.assign`
is available. This is because `util._extend` is found to
be faster than `Object.assign`. This benchmark test is
to keep track of how performance compare.
PR-URL: https://github.com/nodejs/node/pull/7255
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
read() performance is improved most by switching from an array to
a linked list for storing buffered data. However, other changes that
also contribute include: making some hot functions inlinable, faster
read() argument checking, and misc code rearrangement to avoid
unnecessary code execution.
PR-URL: https://github.com/nodejs/node/pull/7077
Reviewed-By: Calvin Metcalf <calvin.metcalf@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
This commit optimizes checkInvalidHeaderChar() by unrolling the
character checking loop a bit.
Additionally, some changes to the benchmark runner are needed in
order for the included benchmark to be run correctly. Specifically,
the regexp used to parse `key=value` parameters contained a greedy
quantifier that was causing the `key` to match part of the `value`
if `value` contained an equals sign.
PR-URL: https://github.com/nodejs/node/pull/6570
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
This benchmark fails on Windows when trying to execute command which
is more than 32k in size. This commits skips this one case when running
under Windows.
PR-URL: https://github.com/nodejs/node/pull/7178
Reviewed-By: Trott - Rich Trott <rtrott@gmail.com>
Reviewed-By: orangemocha - Alexis Campailla <orangemocha@nodejs.org>
Under Windows 'ipc' communication requires the other process to format
its messages with 'IPC framing protocol'. Otherwise, an assert is
triggered in libuv. This commit changes child-process-read benchmark
to use stdout to communicate with parent process. It also adds
child-process-read-ipc.js to benchmark IPC communication using
child node process.
PR-URL: https://github.com/nodejs/node/pull/6971
Reviewed-By: João Reis <reis@janeasystems.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
This commit provides a rewrite of StringDecoder that both improves
performance (for non-single-byte encodings) and understandability.
Additionally, StringDecoder instantiation performance has increased
considerably due to inlinability and more efficient encoding name
checking.
PR-URL: https://github.com/nodejs/node/pull/6777
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Improves numbers up to 4x by avoiding repetitive dynamic method lookup.
PR-URL: https://github.com/nodejs/node/pull/6922
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
In preparation for stricter linting, remove extra spaces.
PR-URL: https://github.com/nodejs/node/pull/6645
Reviewed-By: Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Roman Reiss <me@silverwind.io>
In certain conditions, inspecting a Proxy object can lead to a
max call stack error. Avoid that by detecting the Proxy object
and outputting information about the Proxy object itself.
Fixes: https://github.com/nodejs/node/issues/6464
PR-URL: https://github.com/nodejs/node/pull/6465
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Net benchmarks create partial event emitters that do not have all of the
required event emitter functions. They currently mock out `on`, `once`,
and `emit` functions. This change mocks out `prependListener` as well to
avoid crashing in `_stream_readable`.
PR-URL: https://www.github.com/nodejs/node/pull/6407
Fixes: https://www.github.com/nodejs/node/issues/6405
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Minwoo Jung <jmwsoft@gmail.com>
Reviewed-By: Matthew Loring <mattloring@google.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
In preparation for a lint rule that will enforce
assert.deepStrictEqual() over assert.deepEqual(), change tests and
benchmarks accordingly. For tests and benchmarks that are testing or
benchmarking assert.deepEqual() itself, apply a comment to ignore the
upcoming rule.
PR-URL: https://github.com/nodejs/node/pull/6213
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Adds new microbenchmarks for destructuring, rest params and
default params.
PR-URL: https://github.com/nodejs/node/pull/6222
Reviewed-By: Brian White <mscdex@mscdex.net>
It's useful to be able to force optimization of a function.
Rather than duplicating the code everywhere for it, let's
make a utility available.
PR-URL: https://github.com/nodejs/node/pull/6222
Reviewed-By: Brian White <mscdex@mscdex.net>
Overall cleanup in code, eliminate reliance on `arguments`.
Benchmarks show that as of v8 5.0.71.32, using rest params + apply
has good performance. The spread operator is not yet well optimized
in v8
```
misc/console.js method=restAndSpread concat=1 n=1000000: 374779.38359
misc/console.js method=restAndSpread concat=0 n=1000000: 375988.30434
misc/console.js method=argumentsAndApply concat=1 n=1000000: 682618.61125
misc/console.js method=argumentsAndApply concat=0 n=1000000: 645093.74443
misc/console.js method=restAndApply concat=1 n=1000000: 682931.41217
misc/console.js method=restAndApply concat=0 n=1000000: 664473.09700
```
PR-URL: https://github.com/nodejs/node/pull/6233
Reviewed-By: Brian White <mscdex@mscdex.net>
Aligns the functionality of SlowBuffer with the new Buffer
constructor API. Next step is to docs-only deprecate
SlowBuffer.
Replace the internal uses of SlowBuffer with
`Buffer.allocUnsafeSlow(size)`
PR-URL: https://github.com/nodejs/node/pull/5833
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Adds additional `targetStart`, `targetEnd`, `sourceStart,
and `sourceEnd` arguments to `Buffer.prototype.compare`
to allow comparison of sub-ranges of two Buffers without
requiring Buffer.prototype.slice()
Fixes: https://github.com/nodejs/node/issues/521
PR-URL: https://github.com/nodejs/node/pull/5880
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
When create Buffer from empty string will touch
C++ binding also.
This patch can improve edge case ~70% faster.
PR-URL: https://github.com/nodejs/node/pull/4414
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
4d78121b77 had lint errors that went
undetected. This fixes them.
PR-URL: https://github.com/nodejs/node/pull/5840
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
use String.prototype.repeat() to simplify code, less code,
more semantically.
PR-URL: https://github.com/nodejs/node/pull/5359
Reviewed-By: Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
This commit improves setImmediate() performance by moving the
try-finally block that wraps callback execution into a separate
function because currently v8 never tries to optimize functions
that contain try-finally blocks.
With this change, there is a ~20-40% improvement in the included
setImmediate() depth benchmarks. The breadth benchmarks show a slight
improvement.
PR-URL: https://github.com/nodejs/node/pull/4169
Reviewed-By: Minwoo Jung <jmwsoft@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Several changes:
* Soft-Deprecate Buffer() constructors
* Add `Buffer.from()`, `Buffer.alloc()`, and `Buffer.allocUnsafe()`
* Add `--zero-fill-buffers` command line option
* Add byteOffset and length to `new Buffer(arrayBuffer)` constructor
* buffer.fill('') previously had no effect, now zero-fills
* Update the docs
PR-URL: https://github.com/nodejs/node/pull/4682
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Enabled no-self-assign rule in ESLint.
This required one change in a benchmark file. Changed a loop (that is
outside of the benchmark itself, so performance is not critical) from a
for loop that repeats a string to use String.prototype.repeat() instead.
While at it, took the opportunity to const-ify the benchmark file.
Also moved the "Strict" section in the .eslintrc to match where it is in
the ESLint documentation. Updated the link for Strict rules to point to
the ESLint website rather than the GitHub-hosted code.
PR-URL: https://github.com/nodejs/node/pull/5552
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: targos - Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
PR-URL: https://github.com/nodejs/node/pull/5517
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Array#pop() is known to be faster than Array#shift().
To be exact, it's O(1) vs. O(n). In this case there's no difference
from which side of the "pool" array the object is retrieved,
so .pop() should be preferred.
PR-URL: https://github.com/nodejs/node/pull/2174
Reviewed-By: mscdex - Brian White <mscdex@mscdex.net>
Reviewed-By: jasnell - James M Snell <jasnell@gmail.com>
Reviewed-By: ofrobots - Ali Ijaz Sheikh <ofrobots@google.com>
In order to comply with linting rules used in the rest of the code base,
eliminate redeclared variables. A conservative approach is used so as to
avoid unintentional performance issues (for example, as might be seen in
some situations when using `let` instead of `var`).
PR-URL: https://github.com/nodejs/node/pull/5468
Reviewed-By: Brian White <mscdex@mscdex.net>
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: https://github.com/nodejs/node/pull/5441
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Evan Lucas <evanlucas@me.com>
In the hopes of soon having the benchmark code linted, this change
groups all the likely non-controversial lint-compliance changes such as
indentation, semi-colon usage, and single-vs.-double quotation marks.
Other lint rules may have subtle performance implications in the V8
currently shipped with Node.js. Those changes will require more careful
review and will be in a separate change.
PR-URL: https://github.com/nodejs/node/pull/5429
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Brian White <mscdex@mscdex.net>
The benchmark runner spawns new processes for each configuration. The
specific configuration is transfered by process.argv. This means that
the values have to be parsed. As of right now only numbers and strings
are parsed correctly. However other values such as objects where used.
This fixes the benchmarks that used non-string/number values and
prevents future issues by asserting the type.
PR-URL: https://github.com/nodejs/node/pull/5177
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rod Vagg <rod@vagg.org>
url.js was broken since it didn't use the common.js runner. This fixes
that issue by merging it with url-resolve.js, which also benchmarks
url.resolve.
PR-URL: https://github.com/nodejs/node/pull/5177
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rod Vagg <rod@vagg.org>
Apply strict mode to benchmark code.
PR-URL: https://github.com/nodejs/node/pull/5336
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
This commit improves escape() performance by up to 15% with the
existing querystring-stringify benchmarks by reducing the number
of string concatentations. A potential deopt is also avoided by
making sure the index passed to charCodeAt() is within bounds.
PR-URL: https://github.com/nodejs/node/pull/5012
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
This commit improves parse() performance by ~20-200% with the various
querystring-parse benchmarks.
Some optimization strategies used in this commit include:
* Combining multiple searches (for '&', '=', and '+') on the same
string into a single loop
* Avoiding string.split()
* Minimizing creation of temporary strings
* Avoiding string decoding if no encoded bytes were found and the
default string decoder is being used
PR-URL: https://github.com/nodejs/node/pull/5012
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
This commit splits each path benchmark into separate posix and
Windows benchmark files. This allows benchmarking (platform-)specific
inputs against specific platforms (only).
PR-URL: https://github.com/nodejs/node/pull/5123
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: James M Snell <jasnell@gmail.com>
Zach Bjornson
surya panikkal
James M Snell
Brian White
Rich Trott
Bartosz Sosnowski
Anna Henningsen
Ingvar Stepanyan
Matt Loring
Myles Borins
Jackson Tian
Jackson Tian
Evan Lucas
Anton Khlynovskiy
Andreas Madsen
Matteo Collina