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domruf

less: clean up changelog style

- use table-layout: fixed
Since we already use a fixed width for the most cells, this makes it easier
(faster) for the browser to render specially big tables.
And it allows to use 'text-overflow: ellipsis'. The old ellipsis settings
have no effect.

- use nowrap and 'text-overflow: ellipsis' for all cells
A table is easier (faster) to read for a user if all the row have the same height.
Therefore don't wrap lines and in case of overflow use ellipsis.

- remove unnecessary height
Up until now the row was bigger then 31px so this had no effect.
And it look wrong to make the row bigger then its content.

- remove unnecessary border-color
bootstrap default is almost the same color

- remove unnecessary text-align
left is the default

- remove font-size or use bootstrap .small
Making fonts too small hurts the readability.

- remove some padding and margin

- don't use special colors
The differences are hardly noticable or in case of the gray dates hurt readability.

- remove obsolete table#changesets .logtags style

.. _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.