v0.5 Release – Examining How Other Templates Implement Hg Annotate

In order to complete the goals for my v0.5 release I examined how other templates implement hg annotate. I wanted to find out whether these other implementations had the ability to load 10,000 line cpp files quickly or not.

Default Template

Hgweb comes with a default template, which is quite ugly if you ask me but maybe it is efficient. I put together my local hgweb environment to use the default template and I was able to get a time of ~12secs. However, there was a major problem with this template. I noticed that after about 2000 lines the rest of the lines stopped showing up. The page kept loading new content but as I scrolled down the rest of the page was completely blank. None of the other 8000 or so lines of code were visible. This problem means that this template is of no use to me.

Coal Template

The next step was to try the coal template, which strangely doesn’t look very different from the default template. I configured my local hgweb environment to use the coal template and I got a time of ~14secs. This is not a significant improvement over Mozilla’s template which was clocking in at ~20secs but it is definitely better. Any reduction in loading time is a good thing. The problem is that gitweb_mozilla (the template that Mozilla uses) and the Coal template both use the same type of implementation. They both use one HUGE table to display the file, which obviously is not the correct method to employ (see below).


<div class="page_body">
  <table border="0">


<div class="overflow">
  <table class="bigtable" border="0">
      <th class="annotate">rev</th>
      <th class="lineno">line</th>
      <th class="line">source</th>

Neither of these templates have been able to help me to solve my problem. Next I’ll be having a look at some of the patches that people put up on the bug page. Lets see if they improve annotate’s loading time or not.

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