Conversation

Notices

1. codesections (codesections)'s status on Tuesday, 08-Jan-2019 19:53:02 UTC codesections

   - Have a deeply recursive function in #javaScript
   - Rewrite it naively in #rust
   - Compile with `cargo build --release`
   - Notice it is now 10× *slower*

   …hmm, that wasn't what I expected!

   • codesections (codesections)'s status on Tuesday, 08-Jan-2019 20:12:26 UTC codesections

     in reply to

     • zalandocalrissian

     In case anyone has any thoughts about why the rust version could be so much slower than the javascript version, I decided to ask about it on r/rust here: https://www.reddit.com/r/rust/comments/adyd9j/why_is_the_rust_version_of_this_fn_60_slower_than/

     cc: @zalandocalrissian that has links to the code

   • codesections (codesections)'s status on Tuesday, 08-Jan-2019 20:43:26 UTC codesections

     in reply to

     Wow, the #rust community really is amazing! I posted a fairly beginner question on r/rust just now, and within 10 minutes I got 8 comments—7 of them were attempted solutions, 6 of them were *correct* solutions, and 2 of them had full, running code samples/diffs.

     And *none* of them called me dumb or implied I don't know how to program—even though I made a classic beginner mistake (solving ownership issues with excessive use of `clone()` instead of by understating my code better)