man > openssl-speed(1)

OPENSSL-SPEED(1SSL)                            OpenSSL                           OPENSSL-SPEED(1SSL)

NAME
       openssl-speed - test library performance

SYNOPSIS
       openssl speed [-help] [-elapsed] [-evp algo] [-hmac algo] [-cmac algo] [-mb] [-aead] [-multi
       num] [-async_jobs num] [-misalign num] [-decrypt] [-primes num] [-seconds num] [-bytes num]
       [-mr] [-rand files] [-writerand file] [-engine id] [-provider name] [-provider-path path]
       [-propquery propq] [algorithm ...]

DESCRIPTION
       This command is used to test the performance of cryptographic algorithms.

OPTIONS
       -help
           Print out a usage message.

       -elapsed
           When calculating operations- or bytes-per-second, use wall-clock time instead of CPU user
           time as divisor. It can be useful when testing speed of hardware engines.

       -evp algo
           Use  the  specified cipher or message digest algorithm via the EVP interface.  If algo is
           an AEAD cipher, then you can pass -aead to benchmark a TLS-like sequence. And if algo  is
           a  multi-buffer  capable  cipher,  e.g.  aes-128-cbc-hmac-sha1, then -mb will time multi-
           buffer operation.

           To see the algorithms supported with this option, use "openssl  list  -digest-algorithms"
           or "openssl list -cipher-algorithms" command.

       -multi num
           Run multiple operations in parallel.

       -async_jobs num
           Enable async mode and start specified number of jobs.

       -misalign num
           Misalign the buffers by the specified number of bytes.

       -hmac digest
           Time the HMAC algorithm using the specified message digest.

       -cmac cipher
           Time the CMAC algorithm using the specified cipher e.g.  "openssl speed -cmac aes128".

       -decrypt
           Time the decryption instead of encryption. Affects only the EVP testing.

       -mb Enable multi-block mode on EVP-named cipher.

       -aead
           Benchmark EVP-named AEAD cipher in TLS-like sequence.

       -primes num
           Generate  a  num-prime  RSA  key  and  use  it to run the benchmarks. This option is only
           effective if RSA algorithm is specified to test.

       -seconds num
           Run benchmarks for num seconds.

       -bytes num
           Run benchmarks on num-byte buffers. Affects ciphers, digests and the CSPRNG.   The  limit
           on  the  size  of  the  buffer  is  INT_MAX  -  64 bytes, which for a 32-bit int would be
           2147483583 bytes.

       -mr Produce the summary in a mechanical, machine-readable, format.

       -rand files, -writerand file
           See "Random State Options" in openssl(1) for details.

       -engine id
           See "Engine Options" in openssl(1).  This option is deprecated.

       -provider name
       -provider-path path
       -propquery propq
           See "Provider Options" in openssl(1), provider(7), and property(7).

       algorithm ...
           If any algorithm is given, then those algorithms are  tested,  otherwise  a  pre-compiled
           grand selection is tested.

BUGS
       The  algorithm  can  be  selected only from a pre-compiled subset of things that the "openssl
       speed" command knows about. To test any additional digest or cipher  algorithm  supported  by
       OpenSSL use the "-evp" option.

       There  is no way to test the speed of any additional public key algorithms supported by third
       party providers with the "openssl speed" command.

HISTORY
       The -engine option was deprecated in OpenSSL 3.0.

COPYRIGHT
       Copyright 2000-2022 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use this file  except  in
       compliance  with  the  License.   You  can  obtain  a  copy in the file LICENSE in the source
       distribution or at <https://www.openssl.org/source/license.html>.

3.0.13                                       2026-07-29                          OPENSSL-SPEED(1SSL)