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+Go 1.4.2
+========
+
+39MB/s @1k
+
+ go1.4/src/crypto/cipher$ go test -bench=.
+
+ BenchmarkAESGCMSeal1K 50000 25968 ns/op 39.43 MB/s
+ BenchmarkAESGCMOpen1K 50000 25914 ns/op 39.51 MB/s
+ [...]
+
+Go 1.5
+======
+
+41MB/s @1k
+
+ go1.5/src/crypto/cipher$ ~/go/src/go1.5/bin/go test -bench=.
+
+ BenchmarkAESGCMSeal1K-2 50000 24429 ns/op 41.92 MB/s
+ BenchmarkAESGCMOpen1K-2 50000 24578 ns/op 41.66 MB/s
+ BenchmarkAESGCMSeal8K-2 10000 190340 ns/op 43.04 MB/s
+ BenchmarkAESGCMOpen8K-2 10000 190308 ns/op 43.05 MB/s
+ [...]
+
+openssl 1.0.1k
+==============
+
+302MB/s @1k
+
+ $ openssl speed -elapsed -evp aes-128-gcm
+
+ [...]
+ The 'numbers' are in 1000s of bytes per second processed.
+ type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
+ aes-128-gcm 71275.15k 80063.19k 275048.36k 302066.69k 308912.13k
+
+
+gocryptfs with openssl bindings
+===============================
+
+148MB/s @4k
+
+ gocryptfs/openssl_benchmark$ ./openssl_benchmark.bash
+
+ BenchmarkAESGCMSeal4K 20000 98671 ns/op 41.51 MB/s
+ BenchmarkAESGCMOpen4K 20000 98679 ns/op 41.51 MB/s
+ BenchmarkOpensslGCMenc4K 50000 27542 ns/op 148.72 MB/s
+ BenchmarkOpensslGCMdec4K 50000 27564 ns/op 148.60 MB/s
+
+
+CPU Info
+========
+
+This is tested on a dual-core Intel Sandy Bridge Pentium G630 which does NOT have
+aes instructions ( https://en.wikipedia.org/wiki/AES_instruction_set )
+
+ $ cat /proc/cpuinfo | fold -s -w 80
+
+ processor : 0
+ vendor_id : GenuineIntel
+ cpu family : 6
+ model : 42
+ model name : Intel(R) Pentium(R) CPU G630 @ 2.70GHz
+ stepping : 7
+ microcode : 0x29
+ cpu MHz : 1617.574
+ cache size : 3072 KB
+ physical id : 0
+ siblings : 2
+ core id : 0
+ cpu cores : 2
+ apicid : 0
+ initial apicid : 0
+ fpu : yes
+ fpu_exception : yes
+ cpuid level : 13
+ wp : yes
+ flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
+ pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm
+ constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc
+ aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16
+ xtpr pdcm pcid sse4_1 sse4_2 popcnt tsc_deadline_timer xsave lahf_lm arat epb
+ pln pts dtherm tpr_shadow vnmi flexpriority ept vpid xsaveopt
+ bugs :
+ bogomips : 5387.68
+ clflush size : 64
+ cache_alignment : 64
+ address sizes : 36 bits physical, 48 bits virtual
+ power management:
+
+ [...]