dtolnay/watt

Consider printing warning in non-JIT mode if any single invocation takes >100ms

Open

#19 opened on Oct 31, 2019

View on GitHub
 (0 comments) (0 reactions) (0 assignees)Rust (31 forks)github user discovery
help wanted

Repository metrics

Stars
 (1,501 stars)
PR merge metrics
 (No merged PRs in 30d)

Description

In the non-JIT runtime let's time how long each macro call takes and print a message if any one takes too long, pointing to the JIT installation instructions and explaining that it would likely improve your compile time.

We'll want the warning to somehow appear only once per compilation if possible. Also we'll want some way to silence it in case the user can't install JIT for some reason.

Contributor guide

Research direction
Investigate the macro execution timing in the non JIT runtime, implement a warning when a single invocation exceeds 100ms, ensure it appears only once per compilation, and provide a way to silence it (e.g., environment variable or config).
Tech stack
rust
Domain
developer experience
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
RustGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70