Re: openssl speed -mr format output

On Wed, Feb 5, 2025 at 3:10 PM 'g.fab' via openssl-users <
[email protected]> wrote:

> I am using the following commands with the following outputs:
>
> $ openssl speed -mr *ecdsap256*
>
> +DTP:256:sign:ecdsa:10
>
> +R5:518351:256:9.90
>
> +DTP:256:verify:ecdsa:10
>
> +R6:170670:256:9.99
>
> *+F4:3:256:52358.686869:17084.084084*
>
> $ openssl speed -mr *rsa2048*
>
> +DTP:2048:private:rsa:10
>
> +R1:41622:2048:10.00
>
> +DTP:2048:public:rsa:10
>
> +R2:620842:2048:10.00
>
> *+F2:2:2048:4162.200000:62084.200000*
>
>
> $ openssl speed -mr *ed25519*
>
> +DTP:253:sign:Ed25519:10
>
> +R8:276631:253:Ed25519:10.00
>
> +DTP:253:verify:Ed25519:10
>
> +R9:100024:253:Ed25519:10.00
>
> *+F6:0:253:Ed25519:27663.100000:10002.400000*
>
>
> Why are the highlighted lines showing different flags (*F6, F2, F4*)?
> does this mean that there are differences between the three speed
> operations?
>

The manual <https://docs.openssl.org/3.3/man1/openssl-speed/#options>
explains the -mr option as: "Produce the summary in a mechanical,
machine-readable, format." What's not clear is what reads that format. It
turns out the format is designed to be read by the do_mulit function
<https://github.com/openssl/openssl/blob/78d252889b7d126b9baf5075db6990658c87f85b/apps/speed.c#L4840>
that implements the *-multi* option. That function reads the output of
multiple parallel processes and uses the "+F" prefix to determine which
algorithm was tested.

So +F4 is for ecdsa results
<https://github.com/openssl/openssl/blob/78d252889b7d126b9baf5075db6990658c87f85b/apps/speed.c#L4941>,
+F2 is for rsa results
<https://github.com/openssl/openssl/blob/78d252889b7d126b9baf5075db6990658c87f85b/apps/speed.c#L4911>
and +F6 is for eddsa results
<https://github.com/openssl/openssl/blob/78d252889b7d126b9baf5075db6990658c87f85b/apps/speed.c#L4961>.
Other than that, I don't think the actual F numbers have any significance.

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