[tex4ht] what is the fastest way to convert large document to HTML?

[Michal Hoftich]

Hi Reinhard,

> Hi Michal,
> if you use -j without an argument make will try to do everything at
> the same time.  This leads to zillions of processes and open
> files. It's better to specify the number of available CPUs:
>

Ah, this explains why my computer freeze for 20 minutes when I tried
Nasser's huge file. I read on some page that the -j parameter sets the
number of parallel jobs to number of CPU cores - 1, but it seems that
it is not the case.

> ------------------------------------------------------------------
> #!/usr/bin/env texlua
>
> local cpu_cnt = 4  -- set a reasonable default for non-Linux systems
>
> if os.name == 'linux' then
>   cpu_cnt = 0
>   local cpuinfo=assert(io.open('/proc/cpuinfo', 'r'))
>   for line in cpuinfo:lines() do
>     if line:match('^processor') then
>       cpu_cnt = cpu_cnt + 1
>     end
>   end
>   cpuinfo:close()
> end
>
> -- print(cpu_cnt)
> ------------------------------------------------------------------
>
> And then
>
> -  local command = "make -j -f " .. makefilename
> +  local command = "make -j"..cpu_cnt.." -f " .. makefilename
>

Thanks, this is nice. I will create a make4ht extension from this
code, so it will be possible to use this functionality without need to
create make4ht build files.

Best regards,
Michal