I don't know if they perform better. You have to test it.

Native means for me without call overhead and efficiently compiled (subset of) regexes.

Regarding indexes, I can only imagine a small subset of regexes capable to profit from them, unless a lot of special case optimisation was implemented¹.

It should be quite complicated to achieve this with a pluggable extension...

But again I don't know ... This you should better ask at a DBM-board.

Cheers Rolf
(addicted to the Perl Programming Language :)
see Wikisyntax for the Monastery

¹) I'm not even sure a substring search with LIKE %substr% can take advantage from the index, the differences in your benchmark are not in magnitudes, this could be easily explained with "call overhead and efficiently compiled code".

A real "index search" should be dramatically faster than just factor 4.

And, as a side note, your regexes were much more complicated than a substr search. Apples and oranges...

In reply to Re^3: Documentation of REGEXP support in DBD::SQLite? by LanX
in thread Documentation of REGEXP support in DBD::SQLite? by ibm1620

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.