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perf: avoid unnecessary allocations in base64 encoding of IIP (#1639)

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三咲雅 · Misaki Masa 2024-09-15 00:39:38 +08:00 • committed by GitHub
parent 0acf5c288e
commit 49639aa34c
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1 changed files with 9 additions and 7 deletions
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16
yazi-adapter/src/iip.rs
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@ -1,4 +1,4 @@
use std::{io::Write, path::Path}; use std::{fmt::Write, io::Write as ioWrite, path::Path};
use anyhow::Result; use anyhow::Result;
use base64::{engine::{general_purpose::STANDARD, Config}, Engine}; use base64::{engine::{general_purpose::STANDARD, Config}, Engine};
@ -48,20 +48,22 @@ impl Iip {
JpegEncoder::new_with_quality(&mut b, PREVIEW.image_quality).encode_image(&img)?; JpegEncoder::new_with_quality(&mut b, PREVIEW.image_quality).encode_image(&img)?;
}; };
let len = base64::encoded_len(b.len(), STANDARD.config().encode_padding()); let mut buf = String::with_capacity(
let mut buf = Vec::with_capacity(200 + len.unwrap_or(1 << 16)); 200 + base64::encoded_len(b.len(), STANDARD.config().encode_padding()).unwrap_or(0),
);
write!( write!(
buf, buf,
"{}]1337;File=inline=1;size={};width={}px;height={}px;doNotMoveCursor=1:{}\x07{}", "{}]1337;File=inline=1;size={};width={}px;height={}px;doNotMoveCursor=1:",
START, START,
b.len(), b.len(),
w, w,
h, h,
STANDARD.encode(b),
CLOSE
)?; )?;
Ok(buf) STANDARD.encode_string(b, &mut buf);
write!(buf, "\x07{}", CLOSE)?;
Ok(buf.into_bytes())
}) })
.await? .await?
} }