diff --git a/SM4性能优化.md b/SM4性能优化.md
index 4304394..6ec4c45 100644
--- a/SM4性能优化.md
+++ b/SM4性能优化.md
@@ -88,4 +88,42 @@ asm部分改造自aes的实现，优化结果很惊人！
 CMAC使用CBC模式加密来生成MAC，基于CBC模式的串行化特点以及block加密的性能，其性能必定没有GCM模式好。
 
 # CFB和OFB
-Golang没提供这两种模式的优化接口，可能这两种模式不怎么推荐使用了，况且也就CFB解密可以并行。
\ No newline at end of file
+Golang没提供这两种模式的优化接口，可能这两种模式不怎么推荐使用了，况且也就CFB解密可以并行。
+
+# 和AES的比较
+相比而言，差距还是有点大，最大的是GCM sign/open, 有二十多倍。
+
+    CPU: i5-8265U
+    goos: windows
+    goarch: amd64
+    pkg: github.com/emmansun/gmsm/sm4_test
+    BenchmarkAESCBCEncrypt1K-8   	  914280	      1279 ns/op	 800.49 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4CBCEncrypt1K-8   	   59565	     20344 ns/op	  50.34 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESCBCDecrypt1K-8   	  798015	      1671 ns/op	 612.98 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4CBCDecrypt1K-8   	  194020	      5739 ns/op	 178.44 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESCFBEncrypt1K-8   	  601120	      2085 ns/op	 488.83 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4CFBEncrypt1K-8   	   67990	     21284 ns/op	  47.88 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESCFBDecrypt1K-8   	  750609	      1774 ns/op	 574.31 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4CFBDecrypt1K-8   	   58508	     17990 ns/op	  56.64 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESCFBDecrypt8K-8   	   82408	     14005 ns/op	 584.56 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4CFBDecrypt8K-8   	    8594	    141197 ns/op	  57.98 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESOFB1K-8          	 1000000	      1222 ns/op	 833.65 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4OFB1K-8          	   46080	     22127 ns/op	  46.05 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESCTR1K-8          	  801361	      1373 ns/op	 741.94 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4CTR1K-8          	  226635	      6007 ns/op	 169.65 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESCTR8K-8          	  109918	     11466 ns/op	 714.01 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4CTR8K-8          	   28767	     48448 ns/op	 168.99 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESGCMSeal1K-8      	 4178898	       308 ns/op	3329.79 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4GCMSeal1K-8      	  236019	      5334 ns/op	 191.99 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESGCMOpen1K-8      	 4608244	       313 ns/op	3272.58 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4GCMOpen1K-8      	  231393	      8268 ns/op	 123.85 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESGCMSign1K-8      	 7460964	       182 ns/op	5619.56 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4GCMSign1K-8      	 2458273	       429 ns/op	2384.52 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESGCMSign8K-8      	 1000000	      1066 ns/op	7681.92 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4GCMSign8K-8      	  998692	      1624 ns/op	5043.29 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESGCMSeal8K-8      	  639726	      1707 ns/op	4798.52 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4GCMSeal8K-8      	   27079	     48554 ns/op	 168.72 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkAESGCMOpen8K-8      	  668884	      2139 ns/op	3829.27 MB/s	       0 B/op	       0 allocs/op
+    BenchmarkSM4GCMOpen8K-8      	   26265	     53390 ns/op	 153.44 MB/s	       0 B/op	       0 allocs/op
+    PASS
+    ok  	github.com/emmansun/gmsm/sm4_test	47.862s