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x/mobile: reduce size of generated artifacts #40348

ToJen opened this issue Jul 22, 2020 · 3 comments

x/mobile: reduce size of generated artifacts #40348

ToJen opened this issue Jul 22, 2020 · 3 comments


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@ToJen ToJen commented Jul 22, 2020

The size of Go builds can be shrunk with the ldflags build option like this:
go build -ldflags '-s -w' -o my_app.exe

This can be reduced further with UPX as such:
upx -o my_app_min.exe my_app.exe

More on this here.

I'm able to pass the ldflags into gomobile like this:
gomobile bind -ldflags '-s -w' -target=android

I would like to "inject" UPX somewhere in the bind process to reduce the size of my generated .aar and .framework.

A possible flow is this:

  1. Build: go build -ldflags '-s -w' -o my_app.exe
  2. Shrink: upx -o my_app_min.exe my_app.exe
  3. Pass into gomobile:gomobile bind --from-build=my_app_min.exe -target=android
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@toothrot toothrot commented Jul 22, 2020

/cc @hyangah

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@ToJen ToJen commented Jul 24, 2020

@toothrot @hyangah what's a place to start the investigation. I believe many users will benefit from a smaller aar and framework. Would it make sense at all to achieve it this way?

@ToJen ToJen changed the title x/mobile: include UPX compression option between go build and bind x/mobile: reduce size of generated artifacts Aug 1, 2020
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