[Haserl-users] Performance regression

[Ralph S. <ra...@ne...>]

Hi Nathan et al,

I recently upgraded to 0.9.32 and found a fairly significant
performance regression. I've traced it down to a change done
in 0.9.28 when 'echo' was replaced with 'printf' in the
generated shell script.

For many systems, when the shell is bash, and both echo/printf
are built-ins, there is likely not much difference. However,
I am running haserl on an embedded system using 'ash' shell
(from busybox). It has an option to make 'echo' a builtin, and
I have that enabled, but there is no builtin version of printf.

Consequently, a script that used to execute in 0.25sec now takes
over 4 seconds to execute. Almost all of the script is verbatim
text that just gets echoed.

Given that haserl seems targetted towards small embedded systems,
perhaps the decision to switch from echo to printf might warrant
some additonal discussion?

Regards,
-Ralph