I know this has been brought up before but is it expected to Pants #development

I know this has been brought up before, but is it ...

curved-television-6568

12/27/2021, 6:21 PM

I know this has been brought up before, but is it expected to take minutes to recompile the rust engine after just a small change to single file? (like rule_graph/src/builder.rs for instance)

hundreds-father-404

12/27/2021, 6:21 PM

Rust compilation can be quite slow, especially the linking stage. Use

MODE=debug

when you're iterating on Rust to make it much faster. Also

./cargo check

hundreds-father-404

12/27/2021, 6:23 PM

The newest Rust release added support for custom "profiles" like release vs. devel etc. I still want to experiment with that so that we can make Rust compilation less painful for Python devs using

MODE=debug

is great when iterating on Rust, but the binary is too slow to be useful when iterating on Python. I think there's a middle ground we can have for Python development

curved-television-6568

12/27/2021, 6:29 PM

OK, cool. I’m not doing much on the rust side, atm, so no biggie.. but it strikes me as a pain point, if I were to spend considerable amount on it..

hundreds-father-404

12/27/2021, 6:32 PM

doing rust dev with

MODE=debug

./cargo check

should be pretty zippy. And we can't improve that much more ourselves other than Rust itself getting faster it's Python devs waiting for Rust changes that frustrates me

witty-crayon-22786

12/27/2021, 6:48 PM

yea, both

./cargo check

and

MODE=debug

are really important while iterating on the rust code.

witty-crayon-22786

12/27/2021, 6:48 PM

see https://www.pantsbuild.org/docs/contributions-rust#common-commands

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