Rust

5346 readers

1 users here now

Welcome to the Rust community! This is a place to discuss about the Rust programming language.

Wormhole

[email protected]

Credits

The icon is a modified version of the official rust logo (changing the colors to a gradient and black background)

founded 1 year ago

MODERATORS

[email protected]

Making Rust binaries smaller by default (kobzol.github.io)

submitted 9 months ago by [email protected] to c/[email protected]

13 comments fedilink hide all child comments

Upto 90% for hellworld

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 3 points 9 months ago* (last edited 9 months ago) (1 children)

As mentioned in the article, this concerns release mode, which already does not have symbols by default for user code. It does have symbols for the standard library code, however, due to how the binaries for the standard library are shipped (i.e. with symbols only). This change simply also removes standard library symbols.

If you need symbols, you can use default debugging build, or if you need both compiler optimizations and debugging symbols you can create a custom profile that inherets from release with debug = true. The second you already need to do to get full debugging symbols right now, so this isn't really much of a change from a workflow standpoint.

[–] [email protected] 2 points 9 months ago* (last edited 9 months ago) (1 children)

In fact, this new default will be used for any profile which does not enable debuginfo anywhere in its dependency chain, not just for the release profile.

This is the sentence that tripped me up. But on rereading I'm assuming the debug profile does enable this.

[–] [email protected] 3 points 9 months ago (1 children)

Yeah, definitely :)

The default dev profile is defined as:

[profile.dev]
opt-level = 0
debug = true
split-debuginfo = '...'  # Platform-specific.
strip = "none"
debug-assertions = true
overflow-checks = true
lto = false
panic = 'unwind'
incremental = true
codegen-units = 256
rpath = false

You can find more information in the cargo book page on profiles

[–] [email protected] 1 points 9 months ago

I knew I had to be missing something. Thanks for the insight mate.