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ReStructuredText
35 lines
1.7 KiB
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.. title: Reworking the Bibles, part 2: Speeding things up.
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.. slug: 2007/10/23/reworking-the-bibles-part-2-speeding-things-up
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.. date: 2007-10-23 20:10:35 UTC
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.. tags:
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.. description:
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Since I've been redoing the Bibles, I've been selecting ridiculously
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large ranges of verses to test out my other code, and I've been getting
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fed up with how long it took to fetch all the verses in order to display
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them.
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Let me explain a bit of the process first. When you do a search for
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verses, it doesn't actually fetch the verses at that time. It just runs
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through the database and sees how many verses there are, and then shows
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that to you. Only when you use the "Preview," "Go Live!" or "Add to
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order of service" does openlp.org actually fetch the text of the verses.
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So what would happen is that I would select about 8 chapters' worth of
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verses, which amounts to about 150 to 200 verses, and when I clicked on
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"Preview" it would take anything from 30 seconds to more than a minute
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to fetch those verses. Nope, that's not satisfactory for me, I decided.
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So this evening I sat down and decided to rewrite the code completely.
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The rewritten code is definitely more complicated than the old code, but
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now instead of fetching each and every verse by itself, my code writes a
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bit of a crazy SQL query, which then fetches all the verses at once. A
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much more elegant solution, and MUCH faster. It now takes less than 5
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seconds to fetch those 150 to 200 verses.
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Unfortunately most of you will probably not notice much of a difference.
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I think most passages are only a few verses long... usually no longer
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than about 20 verses, so the performance gain will not be significant.
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However, it should be far faster now for the minority who like to read
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300 verses in a go .
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