Input file now pre-reads N requests, sort them by timestamp and emit on demand.
You can control read depth using --input-file-read-depth which is 100 by default.
It makes implementaiton faster, and it fix various issues when due to concurrenccy, or another issues requests gets addeed out of order.
// PluginReader is an interface for input plugins
type PluginReader interface {
PluginRead() (msg *Message, err error)
}
// PluginWriter is an interface for output plugins
type PluginWriter interface {
PluginWrite(msg *Message) (n int, err error)
}
The focus here was to **reduce allocation in TCP parser** but speed may have hopeful improved too!
pool no longer use map's key of **string** it uses **uint64**
**Benchmarks** was revamped to be more clear
if you want to compare these results copy the benchmark in tcp/bench_test.go@reduce-allocation to tcp/bench_test.go@master:
**before(master)**:
```
BenchmarkPacketParseAndSort-4 1000000 1006 ns/op 64 B/op 2 allocs/op
BenchmarkMessageParserWithoutHint-4 625 1772309 ns/op 1000 packets/op 419096 B/op 10045 allocs/op
BenchmarkMessageParserWithHint-4 74 14969926 ns/op 1000 chunks/op 1002 packets/op 450992 B/op 10126 allocs/op
```
**After(this branch)**:
```
BenchmarkPacketParseAndSort-4 1267662 941 ns/op 64 B/op 2 allocs/op
BenchmarkMessageParserWithoutHint-4 2256 523474 ns/op 1000 packets/op 243530 B/op 1037 allocs/op
BenchmarkMessageParserWithHint-4 80 13990955 ns/op 1000 chunks/op 1002 packets/op 268609 B/op 1099 allocs/op
```
