How Do I Determine the Size of a Go Project?

Determining the Size of a Go Project

Checking the size of a Go project can be essential for managing dependencies and ensuring the project remains within desired bounds. While the project may not be an executable, it can still be a package imported into your own project, so determining its size becomes important.

Solution

To check the size of a Go project, you can inspect its binary size in the $GOPATH/pkg directory. The following steps outline the process:

1. Install the package: Install the package you want to check using the go get command.
2. Navigate to the package directory: Navigate to the directory where the package's binary resides, typically in $GOPATH/pkg/[os]/github.com/[package].
3. Check the binary size: Check the size of the binary using the du -k command, which will display the size in kilobytes (KB).

Example

For instance, to check the size of the gorilla/mux package:

$ go get -u github.com/gorilla/mux
$ cd $GOPATH/pkg/darwin_amd64/github.com/gorilla/
$ du -k *

284 mux.a

Additional Considerations

While library size is important, it's worth noting that the actual space occupied in your executable after the link stage may vary. This is because packages have dependencies that potentially introduce additional "baggage." However, this baggage may be shared by other imported packages.

To truly determine the footprint of imported packages, considering their sub-dependencies is crucial. The Go linker removes baggage during the build process, but analyzing dependency trees provides a more comprehensive understanding of the potential impact on executable size.

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