Use fast decompression in `deflate_bytes`.
This commit changes the parameters of `deflate` to do faster, lower-quality compression. For the compression of LLVM bytecode -- which is the main use of `deflate_bytes` -- it makes compression almost twice as fast while the size of the compressed files is only ~2% worse.
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@ -94,11 +94,14 @@ extern "C" {
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-> *mut c_void;
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}
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const LZ_NORM: c_int = 0x80; // LZ with 128 probes, "normal"
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const LZ_FAST: c_int = 0x01; // LZ with 1 probe, "fast"
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const TDEFL_GREEDY_PARSING_FLAG: c_int = 0x04000; // fast greedy parsing instead of lazy parsing
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/// Compress a buffer without writing any sort of header on the output.
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/// Compress a buffer without writing any sort of header on the output. Fast
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/// compression is used because it is almost twice as fast as default
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/// compression and the compression ratio is only marginally worse.
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pub fn deflate_bytes(bytes: &[u8]) -> Bytes {
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let flags = LZ_NORM;
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let flags = LZ_FAST | TDEFL_GREEDY_PARSING_FLAG;
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unsafe {
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let mut outsz: size_t = 0;
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let res = tdefl_compress_mem_to_heap(bytes.as_ptr() as *const _,
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