On Fri, Jan 07, 2011 at 05:29 -0600, David Champion wrote:
> * On 07 Jan 2011, du yang wrote:
> > Hi,
> >
> > I improved the script to fulfill the author's the expectation(just display
> > time for today's mails),
> > only 'if condition' changed.
> > ...
> > if [ $(date -d "$(date '+%Y-%m-%d')" "+%s") -gt $epoch ]; then
> > echo "%4C %Z %{%d.%m.%y} %-15.15F (%?l?%4l&%4c?) %?H?[%H]?%s%"
>
> It occurs to me that there is an optimization for this specific case.
> Since the desired breaking point is simply "the beginning of today",
> you can exploit the fact that %Y%m%d is a monotonic function when you
> interpret it as an integer. (That is, it alpha-sorts and integer-sorts
> in the same order as it date-sorts.)
>
> set index_format="./format_date.sh '%[%Y%m%d]' |"
>
> #!/bin/sh
>
> if [ $1 -eq `date +%Y%m%d` ]; then
> echo "%4C %Z %{ %H:%M} %-15.15F (%?l?%4l&%4c?) %?H?[%H]?%s%"
> else
> echo "%4C %Z %{%d.%m.%y} %-15.15F (%?l?%4l&%4c?) %?H?[%H]?%s%"
> fi
>
> I'm still not sure about performance though. I have a 58-row terminal
> and do not want to run 116 processes for each page view in mutt. :)
>
>
>
> Aha, finally I have discovered a use for mutt's %<strftime> expando.
> You can optimize this one step further.
>
> set index_format="./format_date.sh '%[%Y%m%d]' '%<%Y%m%d>' |"
>
> #!/bin/sh
>
> if [ $1 -eq $2 ]; then
> echo "%4C %Z %{ %H:%M} %-15.15F (%?l?%4l&%4c?) %?H?[%H]?%s%"
> else
> echo "%4C %Z %{%d.%m.%y} %-15.15F (%?l?%4l&%4c?) %?H?[%H]?%s%"
> fi
>
> A single exec per message now; that's as good as it gets without
> patching mutt.
>
> I 'stole' %<strftime> for my nested_if patch because it looked
> completely useless, so if you happen to be using nested_if, this latter
> version won't work. Now that I see a purpose for %<...> I'll have to
> revisit nested_if. (Unfortunately all the paired symbols are used
> already.)
>
Excellent!
your improvement is helpful for some slow machines and machines during high
load such as compiling.
And mutt should be a single thread program, so it could just flush the terminal
line by line, and would not fork many processes simultaneously.
- du yang
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