For throughput benchmarks, run with just 5s durations rather than 1s and 3s.
For startup benchmark, run with just a single 1s duration, since it's very
consistent anyway.
This increases fs.WriteStream throughput dramatically by removing the
"higher default water marks" for fs.WriteStream.
Also includes a benchmark. Current performance is significantly higher
than v0.8 for strings at all tested levels except size=1. Buffer
performance is still lackluster.
Further improvement in the stream.Writable base class is required, but
this is a start.
Improvements:
* floating point operations are approx 4x's faster
* Now write quiet NaN's
* all read/write on floating point now done in C, so no more need for
lib/buffer_ieee754.js
* float values have more accurate min/max value checks
* add additional benchmarks for buffers read/write
* created benchmark/_bench_timer.js which is a simple library that
can be included into any benchmark and provides an intelligent tracker
for sync and async tests
* add benchmarks for DataView set methods
* add checks and tests to make sure offset is greater than 0
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