我有一个大数据文件,已使用 boost IOStreams 和过滤流缓冲区使用 Zlib 进行压缩:
boost::iostreams::array_source uncompressedArray( reinterpret_cast< const char* >( &uncompressedData[0] ), uncompressedData.size() );
boost::iostreams::filtering_streambuf< boost::iostreams::output > out;
out.push( *m_compressor );
out.push( boost::iostreams::char_back_inserter( compressedData ) );
boost::iostreams::copy( uncompressedArray, out );
为了提高速度,我使用以下内容初始化 zlib 库:
boost::iostreams::zlib_params params;
params.level = boost::iostreams__zlib::best_speed;
params.mem_level = 9;
m_compressor.reset( new boost::iostreams::zlib_compressor( params, 131072 ) );
m_decompressor.reset( new boost::iostreams::zlib_decompressor( params, 131072 ) );
我的解压器看起来像这样:
boost::iostreams::array_source compressedArray( reinterpret_cast< const char* >( &compressedData[0] ), compressedData.size() );
boost::iostreams::filtering_streambuf< boost::iostreams::input > m_in;
m_in.push( *m_decompressor );
m_in.push( compressedArray );
boost::iostreams::copy( m_in, boost::iostreams::char_back_inserter( uncompressedData ) );
我的问题是有什么方法可以加快充气(解压缩)操作吗?目前,压缩占用了我大约 83% 的数据访问时间,我确实需要更快地完成压缩。任何建议将不胜感激。