Remove a lot of branches from the inner loop. Speeds up buf.toString('base64')
by about 20%.
Before:
$ time out/Release/node benchmark/buffer-base64-encode.js
real 0m6.607s
user 0m5.508s
sys 0m1.088s
After:
$ time out/Release/node benchmark/buffer-base64-encode.js
real 0m5.520s
user 0m4.520s
sys 0m0.992s
Work around an issue with the glibc malloc() implementation where memory blocks
are never returned to the operating system when they are allocated with brk()
and have overlapping lifecycles.
Fixes#4283.
Make buffers report the proper retained size in heap snapshots.
Before this commit, Buffer objects would show up in the heap profiler as being
only a few hundred bytes large, even if the actual buffer was many megabytes.
Throw, don't abort. `new Buffer(0x3fffffff + 1)` used to bring down the process
with the following error message:
FATAL ERROR: v8::Object::SetIndexedPropertiesToExternalArrayData() length
exceeds max acceptable value
Fixes#2280.
It was decided that the performance benefits that isolates offer (faster spin-up
times for worker processes, faster inter-worker communication, possibly a lower
memory footprint) are not actual bottlenecks for most people and do not outweigh
the potential stability issues and intrusive changes to the code base that
first-class support for isolates requires.
Hence, this commit backs out all isolates-related changes.
Good bye, isolates. We hardly knew ye.
The base64 decoder would intermittently throw an out-of-bounds exception when
the buffer in `buf.write('', 'base64')` was a zero-sized buffer located at the
end of the slab.
Fixes#2657.
Honor the length argument in `buf.write(s, 0, buf.length, 'base64')`. Before
this commit, the length argument was ignored. The decoder would keep writing
until it hit the end of the buffer. Since most buffers in Node are slices of
a parent buffer (the slab), this bug would overwrite the content of adjacent
buffers.
The bug is trivially demonstrated with the following test case:
var assert = require('assert');
var a = Buffer(3);
var b = Buffer('xxx');
a.write('aaaaaaaa', 'base64');
assert.equal(b.toString(), 'xxx');
This commit coincidentally also fixes a bug where Buffer._charsWritten was not
updated for zero length buffers.
