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#1 2019-05-24 12:29:32

etc
Developer
Registered: 2010-11-11
Posts: 3,170
Website

Proposal: optimize Last-Modified handle entry

If we inspect the trace logs of a typical txp public site, the common cycle-eaters could look like this:

<!-- Trace summary:
Runtime   : 39.74 ms
...
-->

<!-- Trace log:
  Time(ms) | Duration | Trace
      0.66 |     5.76 | [PHP includes, stage 1]
      7.76 |    12.12 | [PHP includes, stage 2]
      ...
     22.51 |     4.33 | [SQL: SELECT name, data FROM txp_lang WHERE lang = 'en' AND name != '' AND (event IN ('public','common') OR owner != '') ]
     27.11 |     5.30 | [Loading plugins]

But most of these operations (loading libraries, language strings, plugins) are useless in Live mode on successive visits if the site has not changed, since finally txp just sends 304 Not Modified header and exits. The browser then pulls the page from its cache anyway.

Could we send this header a little earlier, at least before language strings and plugins are loaded? The main issue is that some plugins might need to alter the normal processing (say, redirect to somewhere else or write to db) before handle_lastmod() is called. I would suggest that only those assigned a loading order below some threshold (5? 3? even 0?) are loaded at early stages, but this is not totally bw-compatible.

Any better suggestion, to make txp a little greener?


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#2 2019-05-25 09:24:19

phiw13
Plugin Author
From: Japan
Registered: 2004-02-27
Posts: 1,668
Website

Re: Proposal: optimize Last-Modified handle entry

etc wrote #318200:

Could we send this header a little earlier, at least before language strings and plugins are loaded?

That sounds a nice little optimisation.

The main issue is that some plugins might need to alter the normal processing (say, redirect to somewhere else or write to db) before handle_lastmod() is called.

What type of plugin would that be ?

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#3 2019-05-25 16:33:36

etc
Developer
Registered: 2010-11-11
Posts: 3,170
Website

Re: Proposal: optimize Last-Modified handle entry

phiw13 wrote #318208:

What type of plugin would that be ?

Public-side plugins dealing with URL customization, atom/rss feeds, comments and file downloads. Some of them could require a patch, though I have no examples to cite.


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#4 2019-05-25 16:44:09

colak
Admin
From: Cyprus
Registered: 2004-11-20
Posts: 7,271
Website

Re: Proposal: optimize Last-Modified handle entry

etc wrote #318215:

Public-side plugins dealing with URL customization, atom/rss feeds, comments and file downloads. Some of them could require a patch, though I have no examples to cite.

Hi Oleg,
There is com_connect and ext_file_attach but here’s an old but still working one which might help with the testing.

# Name: zem_redirect v1.2.1 (compressed)
# Type: Public plugin
# Redirect Pro: handle incorrect, outdated and duplicate URLs
# Author: Alex Shiels
# URL: http://thresholdstate.com/
# Recommended load order: 5

# .....................................................................
# This is a plugin for Textpattern CMS - http://textpattern.com/
# To install: textpattern > admin > plugins
# Paste the following text into the 'Install plugin' box:
# .....................................................................

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Yiannis
——————————
neme.org | hblack.net | LABS | State Machines | Respbublika! | NeMe @ github

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#5 2019-05-29 10:44:19

etc
Developer
Registered: 2010-11-11
Posts: 3,170
Website

Re: Proposal: optimize Last-Modified handle entry

Thanks Yiannis, appreciated. A commit is landed in dev branch, please report any issue.


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