Faster tar xzf linux-3.0.tar.gz

[rfjakob]

tar xzf linux-3.0.tar.gz is my canonical small-file benchmark. Gocryptfs takes 2x the time compared to EncFS.
Looking at the cpu profile, this is caused by heavy GC activity that originates in go-fuse. For each created file, an inode object is allocated. Recycling inode objects could reduce GC pressure considerably.

[kofalt]

The new(ish) sync.Pool may be of significant help here.

[rfjakob]

Pool looks awesome! Is it already in Go 1.3?

[kofalt]

I had a look, and in go 1.3.3 this ran without error:

package main

import (
    "sync"
)

func main() {
    p := sync.Pool{
        New: func() interface{} {
            return nil
        },
    }
    p.Get()
}

It looks like it was added in 1.3.

[rfjakob]

Fixed by hanwen/go-fuse#91

[rfjakob]

Merged as hanwen/go-fuse@c4b6b79 .