How to reduce binary file size when build from source?

Dev Discussions
1

What is the problem you are having with rclone?

I want to reduce binary size when build from source.

Current i got a 98MB binary when run go install github.com/rclone/rclone@latest, which is near 2x than official release.

Then i try cd rclone && make , got a 65MB binary file , which is still a little big.

I found the difference between mine and officical release is go/linking: dynamic, official release is go/linking: static

Any suggestions are appreciated.

followed document : Install

Run the command 'rclone version' and share the full output of the command.

rclone v1.63.1

  • os/version: ubuntu 23.04 (64 bit)
  • os/kernel: 6.2.0-26-generic (x86_64)
  • os/type: linux
  • os/arch: amd64
  • go/version: go1.20.7
  • go/linking: dynamic
  • go/tags: none
2

by default it contains all debug symbols.

I guess you do not need them in your "release"

go build -ldflags="-s -w"
3

I just executed these commands, and it seems to have helped a bit.

But file size still remain 63MB. The current official file size is 50MB.

4

There are some other optimisations included in the official release. Maybe it is good idea to document how to build official release version.

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5

what about:

go build -trimpath -ldflags="-s -w"
6

62 MB after add ‘-trimpath'

7

have a look around GitHub - rclone/rclone: "rsync for cloud storage" - Google Drive, S3, Dropbox, Backblaze B2, One Drive, Swift, Hubic, Wasabi, Google Cloud Storage, Yandex Files release build scripts should be somewhere around.

8

Before i post this topic i looked through the official GitHub Action YAML file and didn't find any special tricks.

Maybe i am missed something.

9

Let's see maybe somebody else can point us into right direction

10

Yeah.

Thank you very much for your reply !

11

There are some docs here:

12

Try this

CGO_ENABLED=0 go build -ldflags="-s"

It should get you most of the way there

Note that if you want to reduce binary size further, comment out backends in backend/all/all.go that you don't need and commands in cmd/all/all.go

1 Like
13

This works! binary file size now same as officical.
Thank you !

1 Like
14

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