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From: Sebastian Gniazdowski <psprint@fastmail.com>
To: zsh-users@zsh.org
Subject: Re: Match to the end of string when using (S) flag
Date: Tue, 01 Nov 2016 11:29:35 -0700	[thread overview]
Message-ID: <1478024975.3113621.774078481.323B1F9E@webmail.messagingengine.com> (raw)
In-Reply-To: <1478017673.3085741.773974873.7C58DD0B@webmail.messagingengine.com>

A miracle optimization – via mathematical function!

    __hsmw_region_highlight_data=( )
    : "${text//(#mi)(${~colsearch_pattern})/$(( append(MBEGIN,MEND) ))}"
    region_highlight+=( $__hsmw_region_highlight_data )

    shappend() {
        __hsmw_region_highlight_data+=( "$(( offset + $1 - 1 )) $((
        offset + $2 )) ${__hsmw_hl_color}" )
    }
    functions -M append 2 2 shappend

This gives total time (time of anonymous function wrapping first three
lines) for a complex – three-word A|B|C – input pattern: 44 ms (17 ms in
shappend).

When I do:
    : "${(S)text//*(#bi)(${~colsearch_pattern})/$((
    append(mbegin[1],mend[1]) ))}"

then the time is: 528 ms ! After removing leading star *: 52 ms (18 ms
in shappend).

Time of original one-liner without math-function call: 502 ms.

-- 
  Sebastian Gniazdowski
  psprint@fastmail.com


  reply	other threads:[~2016-11-01 18:29 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-01 14:25 Sebastian Gniazdowski
2016-11-01 16:27 ` Sebastian Gniazdowski
2016-11-01 18:29   ` Sebastian Gniazdowski [this message]
2016-11-01 21:23     ` Bart Schaefer
2016-11-02  6:53       ` Sebastian Gniazdowski
2016-11-02 15:50         ` Bart Schaefer
2016-11-02  9:46       ` Peter Stephenson
2018-11-07 12:30       ` Sebastian Gniazdowski
2018-11-07 15:25         ` Bart Schaefer
2018-11-07 17:16           ` Sebastian Gniazdowski

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