Re: drop benchmarks/ubench

On Thu, 01 Jan 2026 22:36:33 +0100,
Jan Stary <hans@stare.cz> wrote:
>
> I genuinely don't think there is any loss in ditching this.

Base on https://repology.org/project/ubench/versions I'd like to agree that
it useless and OK kirill@ to remove it.

> The source hasn't been touched in 25 years, the homepage doesn't exist,
> and it is not a benchmark of anything.
>
> CPU performance is measured by timing this:
>
> unsigned cpucalc(pmin) /* performs rather senseless calcs */
> unsigned pmin;
> {
> double x,y;
> unsigned i,j,k=0;
> i=pmin;
> for (j=0;j<i;j++)
> if ( j%67 )
> k+=j%(i-j+1);
> else
> {
> x=i-j;
> y=log(1.0+x);
> x=abs(sqrt(y/(2.0+x))*(x*cos(atan(y/(3.0+x)))+y*sin(atan(y/(4.0+x)))));
> if ( x > 10.0 )
> y=pow(1.0+j/(5.0+x),y/(6.0+x));
> else
> y=pow(1.0+y/(1+j),x);
> x=x*exp(1.0/(1.0+y));
> k+=x;
> }
> i=k%99;
> if ( i==0 ) i++;
> return i;
> }
>
> It "will spawn about 2 concurrent processes for each CPU available
> on the system. This ensures all available raw CPU horsepower is used."
> This is my PC during that CPU benchmark:
>
> CPU0: 100% user, 0.0% nice, 0.0% sys, 0.0% spin, 0.0% intr, 0.0% idle
> CPU1: 0.0% user, 0.0% nice, 0.0% sys, 0.0% spin, 0.0% intr, 100% idle
> CPU2: 0.0% user, 0.0% nice, 0.0% sys, 0.0% spin, 0.0% intr, 100% idle
> CPU3: 0.0% user, 0.0% nice, 0.0% sys, 0.0% spin, 0.0% intr, 100% idle
> CPU4: 100% user, 0.0% nice, 0.0% sys, 0.0% spin, 0.0% intr, 0.0% idle
> CPU5: 0.0% user, 0.0% nice, 0.0% sys, 0.0% spin, 0.0% intr, 100% idle
> CPU6: 0.0% user, 0.0% nice, 0.0% sys, 0.0% spin, 0.0% intr, 100% idle
> CPU7: 0.0% user, 0.0% nice, 0.0% sys, 0.0% spin, 0.0% intr, 100% idle
>
> Similar lolz for mem performance; the average of the two is
> "the Ubench AVG benchmark which is supposed to represent the true
> computing power of the system."
>
> Jan
>

--
wbr, Kirill