stupidgcm: completely replace spacemonkeygo/openssl

1 files changed, 13 insertions, 0 deletions

diff --git a/Documentation/openssl-gcm.md b/Documentation/openssl-gcm.md
new file mode 100644
index 0000000..d955b39
--- /dev/null
+++ b/Documentation/openssl-gcm.md
@@ -0,0 +1,13 @@
+Go builtin GCM vs OpenSSL
+=========================
+
+OpenSSL is over four times faster than Go's built-in GCM implementation.
+
+```
+$ cd internal/stupidgcm
+$ go test -bench .
+PASS
+Benchmark4kEncStupidGCM-2	   50000	     25860 ns/op	 158.39 MB/s
+Benchmark4kEncGoGCM-2    	   10000	    116050 ns/op	  35.29 MB/s
+ok  	github.com/rfjakob/gocryptfs/internal/stupidgcm	3.667s
+```