Hi Branden,
On 2026-03-17 G. Branden Robinson wrote:
> Which of these standard C++ libraries is groff linked with on your
> system?
>
> For me:
>
> $ ldd $(type -p groff)
> linux-vdso.so.1 (0x00007ffe7df89000)
> libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6
> (0x00007fa7659a9000)
> libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fa765865000)
> libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1
> (0x00007fa76584b000)
> libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fa765677000)
> /lib64/ld-linux-x86-64.so.2 (0x00007fa765bc2000)
$ ldd $(type -p groff)
linux-vdso.so.1 (0x00007f8911ba9000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f8911800000)
libm.so.6 => /usr/lib/libm.so.6 (0x00007f89116e2000)
libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007f8911b26000)
libc.so.6 => /usr/lib/libc.so.6 (0x00007f89114f1000)
/lib64/ld-linux-x86-64.so.2 => /usr/lib64/ld-linux-x86-64.so.2
(0x00007f8911bab000)
>
> My glibc and libstdc++ are geriatric compared to yours.
>
> libc6:amd64 2.31-13+deb11u13
> libstdc++6:amd64 10.2.1-6
You use Debian, right? Arch is a pretty bleeding edge distro.
>> > Can you re-run your test scenario with the `-Z` option added to
>> > groff's command line? I'm curious to know how cutting grotty out of
>> > the execution pipeline affects the numbers.
>>
>> I used this script:
>
> Hmm, that's dimich's, not mine.
Oh, sorry. Here are the times with your script. No problem there, then:
generating up to 20 copies of "/home/mojo/tmp/bash.1" using device 'utf8'
find data in 68145a.*.dat
n 1.23.0 1.24.0
1 0.36 0.38
2 0.74 0.74
3 1.27 1.32
4 1.59 1.52
5 1.94 2.00
6 2.47 2.52
7 3.11 3.01
8 3.58 3.38
9 3.96 4.02
10 4.66 4.64
11 5.39 5.64
12 6.12 6.16
13 7.17 7.12
14 8.05 7.96
15 9.13 9.17
16 10.34 9.85
17 11.07 10.99
18 12.01 12.30
19 13.43 13.24
20 14.74 14.50
Regards,
Morten
