libgocryptfs/internal/prefer_openssl/prefer_go1.6.go
2016-12-10 21:04:17 +01:00

30 lines
740 B
Go

// +build go1.6,amd64
// go1.6+ AND amd64
package prefer_openssl
import (
"runtime"
"github.com/rfjakob/gocryptfs/internal/stupidgcm"
)
// PreferOpenSSL tells us if OpenSSL is faster than Go GCM on this machine.
// Go GCM is faster when the CPU has AES instructions and Go is v1.6 or higher
// on amd64.
//
// See https://github.com/rfjakob/gocryptfs/issues/23#issuecomment-218286502
// for benchmarks.
func PreferOpenSSL() bool {
if stupidgcm.BuiltWithoutOpenssl {
return false
}
if runtime.GOOS == "darwin" {
// OSX does not have /proc/cpuinfo, let's just assume the CPU has AES
// acceleration. Virtually all Macs that are running today have it I
// guess?
return false
}
return filePreferOpenSSL("/proc/cpuinfo")
}