将 “Add logs to cargo bench” 翻译为中文:向 cargo bench 添加日志。

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英文:

Add logs to cargo bench

问题

I'm using the criterion library to benchmark some code and am in need of printing logs via the log crate. I ran the following command on this snippet of code:

cargo bench --bench my_benchmark

warn!("Please warn");
println!("Please print");

But surprisingly found that my output looked like this:

Please print

At first when I wasn't seeing logs I figured I was missing the --nocapture flag based on a similar question asked on SO on adding logs to unit tests and the criterion docs. This had no effect. Neither did adding the RUST_LOG parameter.

Same output as above

cargo bench --bench my_benchmark -- --nocapture

Same output as above

RUST_LOG=debug cargo bench --bench my_benchmark

I don't know if I'm missing something obvious from a crate feature or if this is possible at all. Any help would greatly improve my time to debug. Thank you!

英文:

I'm using the criterion library to benchmark some code and am in need of printing logs via the log crate. I ran the following command on this snippet of code:

cargo bench --bench my_benchmark

warn!("Please warn");
println!("Please print");

But surprisingly found that my output looked like this:

Please print

At first when I wasn't seeing logs I figured I was missing the --nocapture flag based on a similar question asked on SO on adding logs to unit tests and the criterion docs. This had no effect. Neither did adding the RUST_LOG parameter.

# Same output as above
cargo bench --bench my_benchmark -- --nocapture

# Same output as above
RUST_LOG=debug cargo bench --bench my_benchmark

I don't know if I'm missing something obvious from a crate feature or if this is possible at all. Any help would greatly improve my time to debug. Thank you!

答案1

得分: 0

Simply add the logger initialization to each benchmark.

use log::warn;

env_logger::builder().is_test(true).try_init().unwrap();
warn!("This prints");

英文:

Simply add the logger initialization to each benchmark.

use log::warn; 

env_logger::builder().is_test(true).try_init().unwrap();
warn!("This prints");

huangapple
  • 本文由 发表于 2023年5月11日 03:50:02
  • 转载请务必保留本文链接:https://go.coder-hub.com/76222116.html
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