stick to the semantic of socket write buffer

v3.14

Update README.md

enqueue input

enqueue input , default to 128 packets

v3.12

update test

Throughput optimization on non-FEC and non-Crypt Session

Throughput optimization on non-FEC and non-Crypt Session, almost doubled maximum transfer speed.

v3.10

user time.After for 0 cpu usage when idle

v3.9

use range instead of i++

cache optimization on flush loop

v3.8

optimize time updates in flush loop

v3.7

simplify a line

plenty of memory optimizations and leak fix

v3.6

fix memory leak

v3.5

set inner recv chan length 1, emitter chan length to 1