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Thomas De Schampheleire
HTML email templates: Outlook: fix width and height attributes to preserve whitespace

The rendering of HTML emails in Outlook is very restricted and based on old
Internet Explorer versions (more or less the same rendering as in Microsoft
Word). To make the Kallithea emails look the same as in the browser, some
adaptations are needed.

HTML width and height attributes do not have any effect, the size is
interpreted as 0px. A CSS-based width and height do work in Outlook and
result in the expected spacing between and within elements of the email.

For Outlook rendering, the CSS variant is probably sufficient, but as it is
unclear how other mail agents will interpret this, leave the HTML width and
height attributes as well.
.. _statistics:

=====================
Repository statistics
=====================

Kallithea has a *repository statistics* feature, disabled by default. When
enabled, the amount of commits per committer is visualized in a timeline. This
feature can be enabled using the ``Enable statistics`` checkbox on the
repository ``Settings`` page.

The statistics system makes heavy demands on the server resources, so
in order to keep a balance between usability and performance, statistics are
cached inside the database and gathered incrementally.

When Celery is disabled:

  On each first visit to the summary page a set of 250 commits are parsed and
  added to the statistics cache. This incremental gathering also happens on each
  visit to the statistics page, until all commits are fetched.

  Statistics are kept cached until additional commits are added to the
  repository. In such a case Kallithea will only fetch the new commits when
  updating its statistics cache.

When Celery is enabled:

  On the first visit to the summary page, Kallithea will create tasks that will
  execute on Celery workers. These tasks will gather all of the statistics until
  all commits are parsed. Each task parses 250 commits, then launches a new
  task.