libjpeg-turbo是对libjpeg的扩展，支持SIMD指令，如X86架构的MMX、SSE、SSE2、3DNOW，ARM架构的NEON，在对jpeg进行编码和解码的过程中能提高速度。-libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, NEON) to accelerate baseline JPEG compression and decompression on x86, x86-64