perf: add BufWriter to Stderr to avoid frequent system calls and increase rendering frame rate
#849
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…increase rendering frame rate
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Resolves an issue reported by @DreamMaoMao on Yazi's Discord server, https://discord.com/channels/1136203602898194542/1136203604076802092/1223142137860984943
This PR fixes a performance regression introduced by the latest main branch. Recently, Yazi switched from
stdouttostderr, but sincestderris unbuffered (previouslystdoutwas line-buffered, i.e.LineWriter), this change caused a decrease in rendering frame rate.This PR adds a block buffer (
BufWriter) tostderr, while solving this performance regression, it theoretically can further improve performance - this is an example comparingLineWriterandBufWriter, https://github.com/orhun/rust-stdout-vs-stderr(Image source: https://github.com/orhun/rust-stdout-vs-stderr)