root@appie:/tmp/tinc-1.0.31# export OPENSSL_ia32cap="0x200000200000000"
root@appie:/tmp/tinc-1.0.31# openssl speed -elapsed -evp aes-256-gcm
You have chosen to measure elapsed time instead of user CPU time.
Doing aes-256-gcm for 3s on 16 size blocks: 4531609 aes-256-gcm's in 3.00s
Doing aes-256-gcm for 3s on 64 size blocks: 2055567 aes-256-gcm's in 3.00s
Doing aes-256-gcm for 3s on 256 size blocks: 656201 aes-256-gcm's in 3.00s
Doing aes-256-gcm for 3s on 1024 size blocks: 176089 aes-256-gcm's in 3.00s
Doing aes-256-gcm for 3s on 8192 size blocks: 22358 aes-256-gcm's in 3.00s
Doing aes-256-gcm for 3s on 16384 size blocks: 11219 aes-256-gcm's in 3.00s
OpenSSL 1.1.0f  25 May 2017
built on: reproducible build, date unspecified
options:bn(64,64) rc4(8x,int) des(int) aes(partial) blowfish(ptr) 
compiler: gcc -DDSO_DLFCN -DHAVE_DLFCN_H -DNDEBUG -DOPENSSL_THREADS -DOPENSSL_NO_STATIC_ENGINE -DOPENSSL_PIC -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DRC4_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DGHASH_ASM -DECP_NISTZ256_ASM -DPADLOCK_ASM -DPOLY1305_ASM -DOPENSSLDIR="\"/usr/lib/ssl\"" -DENGINESDIR="\"/usr/lib/x86_64-linux-gnu/engines-1.1\"" 
The 'numbers' are in 1000s of bytes per second processed.
type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes  16384 bytes
aes-256-gcm      24168.58k    43852.10k    55995.82k    60105.05k    61052.25k    61270.70k
root@appie:/tmp/tinc-1.0.31# unset OPENSSL_ia32cap
root@appie:/tmp/tinc-1.0.31# openssl speed -elapsed -evp aes-256-gcm
You have chosen to measure elapsed time instead of user CPU time.
Doing aes-256-gcm for 3s on 16 size blocks: 6935743 aes-256-gcm's in 3.00s
Doing aes-256-gcm for 3s on 64 size blocks: 4642059 aes-256-gcm's in 3.00s
Doing aes-256-gcm for 3s on 256 size blocks: 2685281 aes-256-gcm's in 3.00s
Doing aes-256-gcm for 3s on 1024 size blocks: 882393 aes-256-gcm's in 3.00s
Doing aes-256-gcm for 3s on 8192 size blocks: 131906 aes-256-gcm's in 3.00s
Doing aes-256-gcm for 3s on 16384 size blocks: 67405 aes-256-gcm's in 3.00s
OpenSSL 1.1.0f  25 May 2017
built on: reproducible build, date unspecified
options:bn(64,64) rc4(8x,int) des(int) aes(partial) blowfish(ptr) 
compiler: gcc -DDSO_DLFCN -DHAVE_DLFCN_H -DNDEBUG -DOPENSSL_THREADS -DOPENSSL_NO_STATIC_ENGINE -DOPENSSL_PIC -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DRC4_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DGHASH_ASM -DECP_NISTZ256_ASM -DPADLOCK_ASM -DPOLY1305_ASM -DOPENSSLDIR="\"/usr/lib/ssl\"" -DENGINESDIR="\"/usr/lib/x86_64-linux-gnu/engines-1.1\"" 
The 'numbers' are in 1000s of bytes per second processed.
type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes  16384 bytes
aes-256-gcm      36990.63k    99030.59k   229143.98k   301190.14k   360191.32k   368121.17k