使用32*256的缓存提升SM2基点倍乘性能 #1558
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使用32*256的缓存提升SM2基点倍乘性能 #1558
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借问一下, 能提升多少呢? |
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这个修改需要的栈内存还不小 |
静态变量存储在堆里而不是栈里 |
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原来签名时椭圆曲线运算量：约256次双倍运算+128次加法算法，现在只需32次加法运算，椭圆曲线运算提升12倍，整体签名性能提升约7-8倍
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静态变量存储在DSS段（未初始化时）或DATA段（已初始化时），不在栈里。 |
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sizeof(SM2_JACOBIAN_POINT) == 3*8 3* 8 * 32 * 256 = 192k字节 好吧, 看来我嵌入式场景用不上这个修改 速度提高这么多, 真的很厉害 |
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使用32*256的缓存提升SM2基点倍乘性能，将基点倍乘转换成32次点加运算，可显著提升SM2签名速度