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Run the program until it prints the given text in the output #814

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@qti3e qti3e commented Apr 29, 2025

Hey, thanks for this project and if this feature doesn't meet the goals of it no hard feelings at all and feel free to close the PR :) - I just personally needed the feature and thought it might not be a bad idea to try to upstream if others also find it useful.

My motivation is that sometimes I need to benchmark a program (and specifically its cold start time) but the program doesn't terminate (think web servers) but just prints a text indicating that it's in a ready state.

For example a next.js app prints a Ready in --- text when it's ready, so I use hyperfine with --until "Ready in" to get the elapsed time until the program prints that line in the output.

Let me know what you think :)

(p.s I can fix it on non-unix if there is interest in the feature, otherwise I don't need it for myself...)

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