When buffer list less than 2, no need to calculate the length.
The change's benchmark result is here:
https://gist.github.com/JacksonTian/2c9e2bdec00018e010e6
It improve 15% ~ 25% speed when list only have one buffer,
to other cases no effect.
PR-URL: https://github.com/iojs/io.js/pull/1437
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Brendan Ashworth <brendan.ashworth@me.com>
When the string is empty, calling the binding is unnecessary and slow.
PR-URL: https://github.com/iojs/io.js/pull/1441
Reviewed-by: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Christian Tellnes <christian@tellnes.no>
When slicing global pool - ensure that the underlying buffer's data ptr
is 8-byte alignment to do not ruin expectations of 3rd party C++ addons.
NOTE: 0.10 node.js always returned aligned pointers and io.js should do
this too for compatibility.
PR-URL: https://github.com/iojs/io.js/pull/1126
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-by: Bert Belder <bertbelder@gmail.com>
The .parent property of the allocated buffer should remain undefined in
the case that it's not a slice. Also included test to verify this.
PR-URL: https://github.com/iojs/io.js/pull/1109
Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com>
Reviewed-By: Fedor Indutny <fedor@indutny.com>
Avoid a costly String#toLowerCase() call in Buffer#write() in the
common case, i.e., that the string is already lowercase. Reduces
the running time of the following benchmark by about 40%:
for (var b = Buffer(1), i = 0; i < 25e6; ++i) b.write('x', 'ucs2');
PR-URL: https://github.com/iojs/io.js/pull/1048
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
The Buffer constructor is used pervasively throughout io.js, yet it was
one of the most unwieldy functions in core. This commit breaks up the
constructor into several small functions in a way that makes V8 happy.
About 8-10% CPU time was attributed to the constructor function before
in buffer-heavy benchmarks. That pretty much drops to zero now because
V8 can now easily inline it at the call site. It shortens the running
time of the following simple benchmark by about 15%:
for (var i = 0; i < 25e6; ++i) new Buffer(1);
And about 8% from this benchmark:
for (var i = 0; i < 1e7; ++i) new Buffer('x', 'ucs2');
PR-URL: https://github.com/iojs/io.js/pull/1048
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Add Buffer#indexOf(). Support strings, numbers and other Buffers. Also
included docs and tests.
Special thanks to Sam Rijs <srijs@airpost.net> for first proposing this
change.
PR-URL: https://github.com/iojs/io.js/pull/561
Reviewed-by: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com>
If the Buffer allocation isn't a slice then there's no need to adjust
the pool offset after realloc'ing the space available.
Fixes: 6462519 "buffer, doc: misc. fix and cleanup"
Remove internal object and expose functions directly on binding. This
makes possible to simply use internal functions in other builtin
modules.
PR-URL: https://github.com/iojs/io.js/pull/770
Reviewed-by: Trevor Norris <trev.norris@gmail.com>
Reviewed-by: Ben Noordhuis <info@bnoordhuis.nl>
Many of the util.is*() methods used to check data types
simply compare against a single value or the result of
typeof. This commit replaces calls to these methods with
equivalent checks. This commit does not touch calls to the
more complex methods (isRegExp(), isDate(), etc.).
Fixes: https://github.com/iojs/io.js/issues/607
PR-URL: https://github.com/iojs/io.js/pull/647
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
A number -> uint32 type coercion bug made buffer sizes
larger than kMaxLength (0x3fffffff) wrap around.
Instead of rejecting the requested size with an exception,
the constructor created a buffer with the wrong size.
PR-URL: https://github.com/iojs/io.js/pull/657
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
This makes possible to use `for..of` loop with
buffers. Also related `keys`, `values` and `entries`
methods are added for feature parity with `Uint8Array`.
PR-URL: https://github.com/iojs/io.js/pull/525
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
This commit replaces a number of var statements throughout
the lib code with const statements.
PR-URL: https://github.com/iojs/io.js/pull/541
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
The copyright and license notice is already in the LICENSE file. There
is no justifiable reason to also require that it be included in every
file, since the individual files are not individually distributed except
as part of the entire package.
Turn on strict mode for the files in the lib/ directory. It helps
catch bugs and can have a positive effect on performance.
PR-URL: https://github.com/node-forward/node/pull/64
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Fedor Indutny <fedor@indutny.com>
* Add official documentation that a Buffer instance is a viable
argument when instantiating a new Buffer.
* Properly set the poolOffset when a buffer needs to be truncated.
* Add comments clarifying specific peculiar coding choices.
* Remove a level of unnecessary indentation.
Signed-off-by: Trevor Norris <trev.norris@gmail.com>
Add generic functions for (U)Int read/write operations on Buffers. These
support up to and including 48 bit reads and writes.
Include documentation and tests.
Additional work done by Trevor Norris to include 40 and 48 bit write
support. Because bitwise operations cannot be used on values greater
than 32 bits, the operations have been replaced with mathematical
calculations. Regardless, they are still faster than floating point
operations.
Reviewed-by: Trevor Norris <trev.norris@gmail.com>
Performance improvement by moving checks for floating point operations
to JS and doing the operation on a protected internal function that
assumes all arguments are correct. Still abort if the operation
overflows memory. This can only be caused if the Buffer's length
property isn't the same as the actual internal length.
Signed-off-by: Trevor Norris <trev.norris@gmail.com>
Running fill() with an empty string would cause Node to hang
indefinitely. Now it will return without having operated on the buffer.
User facing function has been pulled into JS to perform all initial
value checks and coercions. The C++ method has been placed on the
"internal" object.
Coerced non-string values to numbers to match v0.10 support.
Simplified logic and changed a couple variable names.
Added tests for fill() and moved them all to the beginning of
buffer-test.js since many other tests depend on fill() working properly.
Fixes: https://github.com/joyent/node/issues/8469
Signed-off-by: Trevor Norris <trev.norris@gmail.com>
In 4c9b30d removal of the prototype attributes meant NativeBuffer() no
longer had the same object map as Buffer(). By now setting the same
properties in the same order both constructors will produce the same
map.
The same commit changed "parent" from undefined to null. This caused a
failure in Buffer#slice() where it was checked if parent === undefined.
Causing the incorrect parent to be set.
Signed-off-by: Trevor Norris <trev.norris@gmail.com>
Increase the performance of new Buffer construction by initializing all
properties before SetIndexedPropertiesToExternalArrayData call.
Reviewed-by: Trevor Norris <trev.norris@gmail.com>
Creating a new buffer from the toJSON() output of another
buffer does not currently work. This commit adds that
support. Closes#7849.
Signed-off-by: Fedor Indutny <fedor@indutny.com>
Increase the performance and simplify the logic of Buffer#write{U}Int*
and Buffer#read{U}Int* methods by placing the byte manipulation code
directly inline.
Also improve the speed of buffer-write benchmarks by creating a new
call directly to each method by using Function() instead of calling by
buff[fn].
Signed-off-by: Trevor Norris <trev.norris@gmail.com>
Conflicts:
lib/buffer.js
compare() works like String.localeCompare such that:
Buffer.compare(a, b) === a.compare(b);
equals() does a native check to see if two buffers are equal.
Signed-off-by: Trevor Norris <trev.norris@gmail.com>
Fix issue where a signed integer is returned.
Example:
var b = new Buffer(4);
b.writeUInt32BE(0xffffffff);
b.readUInt32BE(0) == -1
Signed-off-by: Trevor Norris <trev.norris@gmail.com>
When our estimates for a storage size are higher than the actual length
of decoded data, the destination buffer should be truncated. Otherwise
`Buffer::Length` will give misleading information to C++ layer.
fix#7365
Signed-off-by: Fedor Indutny <fedor@indutny.com>
Increase the performance and simplify the logic of Buffer#write{U}Int*
and Buffer#read{U}Int* methods by placing the byte manipulation code
directly inline.
Also improve the speed of buffer-write benchmarks by creating a new
call directly to each method by using Function() instead of calling by
buff[fn].
Signed-off-by: Trevor Norris <trev.norris@gmail.com>
Buffer#write() was showing the deprecation warning when only
buf.write('string') was passed. This is incorrect since the encoding is
always optional.
Argument order should follow:
Buffer#write(string[, offset[, length]][, encoding])
(yeah, not confusing at all)
String#toLowerCase() is incredibly slow and was costing a 15-30%
performance hit for Buffers less than 1KB. Now instead it'll attempt to
find the correct encoding directly from the passed encoding, only then
afterwards it'll lowercase.
The optimization for not passing any encoding at all is still at the top
of the method.
At most this may add 10% performance hit for passing a mixed case
encoding.
Length arguments passed to SlowBuffer were coerced to Int32, not Uint32,
so passing a negative number would throw the following:
node: ../src/smalloc.cc:244: void node::smalloc::Alloc(): Assertion `length <= kMaxLength' failed.
Aborted (core dumped)
That has been fixed by coercing to Uint32 and comparing the value
against kMaxLength.
Due to a lot of the util.is* checks there was much unnecessary overhead
for the most common use case of Buffer. Which is creating a new Buffer
instance for data from incoming I/O. NativeBuffer is a simple way to
bypass all the unneeded checks and simply hand back a Buffer instance
while setting the length.
All the Buffer#{ascii,hex,etc.}Slice() methods are intentionally strict
to alert if a Buffer instance was attempting to be accessed out of
bounds. Buffer#toString() is the more user friendly way of accessing the
data, and will coerce values to their min/max on overflow.
Includes:
* No need for `typeof` when checking undefined.
* length is coerced to uint so no need to check if < 0.
* Stay consistent and always throw `new` errors.
* Returning offset + magic number in every write is error prone. Instead
return the central write function which returns the correct offset.
Jackson Tian
Fedor Indutny
Trevor Norris
Ben Noordhuis
Chris Dickinson
Vladimir Kurchatkin
cjihrig
isaacs
Yazhong Liu
Kang-Hao Kenny
Nick Apperson
Feross Aboukhadijeh
Sean McArthur
goussardg
Fedor Indutny
Brian White
Paul Loyd
Timothy J Fontaine