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While the new Buffer implementation is much faster we still have the necessity of using Buffer pools. This is undesirable because it may still lead to unwanted memory retention, but for the time being this is the best solution. Because of this re-introduction, and since there is no more SlowBuffer type, the SlowBuffer method has been re-purposed to return a non-pooled Buffer instance. This will be helpful for developers to store data for indeterminate lengths of time without introducing a memory leak. Another change to Buffer pools was that they are only allocated if the requested chunk is < poolSize / 2. This was done because allocations are much quicker now, and it's a better use of the pool.
Evented I/O for V8 javascript. 
To build:
Prerequisites (Unix only):
* GCC 4.2 or newer
* Python 2.6 or 2.7
* GNU Make 3.81 or newer
* libexecinfo (FreeBSD and OpenBSD only)
Unix/Macintosh:
./configure
make
make install
If your python binary is in a non-standard location or has a non-standard name, run the following instead:
export PYTHON=/path/to/python
$PYTHON ./configure
make
make install
Windows:
vcbuild.bat
To run the tests:
Unix/Macintosh:
make test
Windows:
vcbuild.bat test
To build the documentation:
make doc
To read the documentation:
man doc/node.1