ZSTD_compress函数原型如下: size_t ZSTD_compress(void* dst, size_t dstCapacity, const void* src, size_t srcSize, int compressionLevel) ZSTD_decompress函数原型如下: size_t ZSTD_decompress( void* dst, size_t dstCapacity, const void* src, size_t compressedSize);我们先来看看zstd的压缩与解压...
perf: slight compression ratio improvement for dfast, aka levels 3 and 4 (#4171) perf: runtime bmi2 detection now also enabled on x86 32-bit mode (#4251) cli: multi-threading as default CLI setting, by @daniellerozenblit cli: new --max command (#4290) api: new method ZSTD_compress...
Ratio is also better by a margin of ~20%. Compression speed is always better than zlib on all the payloads we tested; However, czlib has optimisations that make it faster at decompressiong small payloads:Testing with size: 11... czlib: 8.97 MB/s, zstd: 3.26 MB/s Testing with size...
double compressionRatio = (double) compressedData.length / dataToCompress.length; System.out.println("Compression Ratio: " + compressionRatio); 请注意,这里的压缩比计算方式可能不是最准确的,因为它只是简单地比较了字节长度,而没有考虑数据内容的实际大小(例如,如果原始数据包含很多重复的字节,压缩比可能会...
size_tZSTD_compress(void* dst, size_t dstCapacity, const void* src, size_t srcSize, int compressionLevel) ZSTD_decompress函数原型如下: size_t ZSTD_decompress( void* dst, size_t dstCapacity, const void* src, size_t compressedSize); ...
ZSTD_JNI is a native implementation of the ZSTD compression algorithm. Compared with ZSTD, ZSTD_JNI has higher compression read/write efficiency and compression ratio, and allows you to specify the compression level as well as the compression mode for data columns in a specific format. ...
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 4. 参考文档 5 ways Facebook improved compression at scale with Zstandard 应用
--fast[=#]: switch to ultra-fast compression levels. If=#is not present, it defaults to1. The higher the value, the faster the compression speed, at the cost of some compression ratio. This setting overwrites compression level if one was set previously. Similarly, if a compression level...
until compression ratio of the truncated dictionary is at most shrinkDictMaxRegression%(退化率) worse than the compression ratio of the largest dictionary. 启用shrink后,会得到一个最小尺寸的截断的字典,并使其尺寸加倍,直到截断的字典的压缩率最多比最大的字典的压缩率差N%。字典...
zstd is a fast lossless compression algorithm and data compression tool, with command line syntax similar to gzip(1) and xz(1).