go-perftune

go-perftune

Helper tool for manual Go code optimization.

Installation / Quick Start

# Install go-perftune:
$ go get -u github.com/Quasilyte/go-perftune

# Check installation (prints help):
$ go-perftune

# Run almostInlined sub-command on strings and bytes package:
$ go-perftune almostInlined strings bytes

# You can use "std" or "..." package name.
# These follow "go build" conventions.
$ go-perftune almostInlined std

Sub-commands

almostInlined

Find functions that cross inlining threshold just barely.

$ go-perftune almostInlined -threshold=1 std
almostInlined: std: src/strconv/atof.go:371:6: atof64exact: budget exceeded by 1
almostInlined: std: src/strconv/atof.go:405:6: atof32exact: budget exceeded by 1
almostInlined: std: src/reflect/value.go:1199:6: Value.OverflowComplex: budget exceeded by 1
almostInlined: std: src/vendor/golang_org/x/crypto/cryptobyte/builder.go:77:6: (*Builder).AddUint16: budget exceeded by 1
almostInlined: std: src/crypto/x509/x509.go:1858:58: buildExtensions.func2.1.1: budget exceeded by 1
almostInlined: std: src/crypto/x509/x509.go:1878:58: buildExtensions.func2.3.1: budget exceeded by 1
almostInlined: std: src/crypto/x509/x509.go:1890:58: buildExtensions.func2.4.1: budget exceeded by 1
almostInlined: std: src/crypto/tls/handshake_messages.go:1450:6: (*newSessionTicketMsg).marshal: budget exceeded by 1
almostInlined: std: src/net/http/transfer.go:259:6: (*transferWriter).shouldSendContentLength: budget exceeded by 1