Crate exec_time 

exec_time provides an attribute macro for timing sync and async functions.

It is intended for lightweight instrumentation during development and debugging.

Default

use exec_time::exec_time;

#[exec_time]
fn login() {
    std::thread::sleep(std::time::Duration::from_millis(100));
}

Output:

[exec_time] login took 102 ms

Common Options

• print = "always" | "debug" | "never"
• name = "..."
• prefix = "...", suffix = "..."
• unit = "ns" | "us" | "ms" | "s"
• log_over = "500us" | "5ms" | "0.5s"
• warn_over = "500us" | "5ms" | "0.5s"

name overrides the generated function label. warn_over takes precedence over log_over when both thresholds match.

Thresholds

use exec_time::exec_time;

#[exec_time(name = "db.query", warn_over = "250ms")]
fn query_db() {
    std::thread::sleep(std::time::Duration::from_millis(300));
}

Output:

[exec_time][warn] db.query took 300 ms

Notes

• Works with sync and async functions
• Preserves generics, return values, and where clauses
• print = "never" disables all output

Attribute Macros

exec_time

Measure the execution time of a function.