grep performance

[jinceon]

I have a large file, 1.5GB. grep in command line cost 2 seconds. but use unix4j.grep it cost 31 seconds.

[terzerm]

can you provide some more details? some grep statements are faster than others. can you please share a code snippet?

[jinceon]

unix4j.grep(string, file).toStringList()

发自我的iPhone

------------------ Original ------------------ From: Marco Terzer @.> Date: Fri,Jun 16,2023 5:22 PM To: tools4j/unix4j @.> Cc: JinCeon @.>, Author @.> Subject: Re: [tools4j/unix4j] grep performance (Issue #80)

can you provide some more details? some grep statements are faster than others. can you please share a code snippet?

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[terzerm]

you can try with fixed string option, this should usually be faster:

Unix4j.grep(Grep.Options.fixedStrings, string, file).toStringList()

[jinceon]

it works, now is cost 14 seconds.

but it is still slower than native grep

发自我的iPhone

------------------ Original ------------------ From: Marco Terzer @.> Date: Fri,Jun 16,2023 6:44 PM To: tools4j/unix4j @.> Cc: JinCeon @.>, Author @.> Subject: Re: [tools4j/unix4j] grep performance (Issue #80)

you can try with fixed string option, this should usually be faster: Unix4j.grep(Grep.Options.fixedStrings, string, file).toStringList()

— Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: @.***>

[jinceon]