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Re: Why does a loop using instr() and mid() get slower on larger data ?

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"R.Wieser" <address@not.available> wrote

| >  I just tried loading a 100 MB text file and looking
| > for a string near the end. It took .14 seconds
|
| :-)  To many variables.   Loading and searching together ?  ReadLine or
| ReadAll ?
|

  No, dummy. :) I loaded the whole file as a string.
Then I put a Timer call on either side of InStr, so that
I'd just be testing the actual InStr time.

| I'm trying to convert such an dataset into a usable image.   The first 
step
| was to go thru all the "node" elements and plot their coordinates.
|
| Just to check I rewrote the script to read the file line-by-line and see
| what would happen.  The end result is a few times faster than reading all 
of
| it into memory and than have a go at it.   I did not quite expect that ...
|

   That is surprising. I rarely read by line. But I
rarely deal with big files.

   Open Street Map... I
don't suppose you've done anything with weather?
The US service, NOAA, made a big mess of their
radar maps in trying to update them. I'v been puttering
around with options. I can easily get a forecast in JSON,
but can't find a source of simple radar maps that show
where the rain is right now, and how hard it's coming
down.

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Why does a loop using instr() and mid() get slower on larger data ? "R.Wieser" <address@not.available> - 2021-01-02 12:41 +0100
  Re: Why does a loop using instr() and mid() get slower on larger data ? "Mayayana" <mayayana@invalid.nospam> - 2021-01-02 08:39 -0500
    Re: Why does a loop using instr() and mid() get slower on larger data ? "R.Wieser" <address@not.available> - 2021-01-02 16:46 +0100
      Re: Why does a loop using instr() and mid() get slower on larger data ? "Mayayana" <mayayana@invalid.nospam> - 2021-01-02 15:26 -0500
        Re: Why does a loop using instr() and mid() get slower on larger data ? "R.Wieser" <address@not.available> - 2021-01-02 22:11 +0100
          Re: Why does a loop using instr() and mid() get slower on larger data ? "Mayayana" <mayayana@invalid.nospam> - 2021-01-02 17:27 -0500
            Re: Why does a loop using instr() and mid() get slower on larger data ? - found it (I think) "R.Wieser" <address@not.available> - 2021-01-03 08:58 +0100
              Re: Why does a loop using instr() and mid() get slower on larger data ? - found it (I think) "Mayayana" <mayayana@invalid.nospam> - 2021-01-03 08:54 -0500
                Re: Why does a loop using instr() and mid() get slower on larger data ? - found it (I think) "R.Wieser" <address@not.available> - 2021-01-03 16:01 +0100
                Re: Why does a loop using instr() and mid() get slower on larger data ? - found it (I think) "Mayayana" <mayayana@invalid.nospam> - 2021-01-03 12:51 -0500
                Re: Why does a loop using instr() and mid() get slower on larger data ? - found it (I think) "R.Wieser" <address@not.available> - 2021-01-03 19:26 +0100
          Re: Why does a loop using instr() and mid() get slower on larger data ? "Mayayana" <mayayana@invalid.nospam> - 2021-01-02 17:43 -0500
  Re: Why does a loop using instr() and mid() get slower on larger data ? JJ <jj4public@gmail.com> - 2021-01-03 02:47 +0700
    Re: Why does a loop using instr() and mid() get slower on larger data ? "R.Wieser" <address@not.available> - 2021-01-02 21:47 +0100

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