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Feature #11242

Updated by nobu (Nobuyoshi Nakada) almost 4 years ago

---
Note, this relies on [Feature #11229]

This reduces GC overhead and makes the API more consistent
with `IO#read` IO#read and `IO#read_nonblock`. IO#read_nonblock.

Benchmark results:

|


user
user | system | total | real
--------|----------:|----------:|---------:|-----------:
alloc 0.130000 | 0.130000 | 0.280000 | 0.410000 |( ( 0.420656)
extbuf | 0.100000 | 0.220000 | 0.320000 |( ( 0.318708)

~~~ruby

------------------------8<-----------------------
require 'socket'
require 'benchmark'
nr = 100000
msg = ' ' * 16384
size = msg.bytesize
buf = ' ' * size
UNIXSocket.pair(:DGRAM) do |a, b|
Benchmark.bmbm do |x|
x.report('alloc') do
nr.times do
b.send(msg, 0)
a.recv(size, 0)
end
end

x.report('extbuf') do
nr.times do
b.send(msg, 0)
a.recv(size, 0, buf)
end
end
end
end
~~~ ---

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