tclwebtest-general

[tclwebtest] Slowness processing forms

[Grzegorz A. H. <gr...@ef...>]

Hi.

With complex forms, the use of "field find" can increase the
execution time of the test unit from one or two seconds to over
20. The bottleneck is found in extract_forms_if_necessary around
line 2750, the second loop, which uses a regular expression to find
all the form fields once per form field.

Teorically a speedup could be gained by using libraries like expat
through a tcl binding. It's not critical for us at the moment,
but I wanted to point this out in case somebody else wondered why a
"field find" can slow down things a lot.

-- 
 Grzegorz Adam Hankiewicz, gr...@ef.... Tel: +34-94-472 35 89.
 eFaber SL, Maria Diaz de Haro, 68, 2         http://www.efaber.net/
 48920 Portugalete, Bizkaia (SPAIN)

Re: [tclwebtest] Slowness processing forms

[Tilmann S. <ti...@ti...>]

* Grzegorz Adam Hankiewicz <gr...@ef...> [20030402 14:46]:
> Teorically a speedup could be gained by using libraries like expat
> through a tcl binding. It's not critical for us at the moment,
> but I wanted to point this out in case somebody else wondered why a
> "field find" can slow down things a lot.

I experimented with the html mode of tdom some time ago, and found
that while it would provide an incredible speedup, it crashed on some
not-so-exotic pages, which made it not really usable at that point
(Version 0.7.5). Below my comments about the testing.


segfaults when form tag not closed (under some circumstances, not
clear which)


&auml; works, &ouml; and &uuml; not: "can only handle UTF-8 chars up
to 3 bytes long." ??? Also this is some kind of non-catchable error,
which crashes the tcl interpreter - Bad.


error when table tag inside form not closed. Unclosed tr inside table
is ok though.


til

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