Since Horizon is going to be the first (or, one of the first) OpenStack component using the new MongoDB driver, it won't be able to retrieve traces made by other components using MongoDB driver (which it should use because Ceilometer driver was too slow) for a while. This means that Horizon itself is responsible for tracing the rendering of its pages down to the layer where the flow of control leaves Horizon domain. So, a lot of api wrappers in openstack_dashboard.api are augmented with tracing decorator to achieve this goal. Co-Authored-By: Timur Sufiev <tsufiev@mirantis.com> Implements-blueprint: openstack-profiler-at-developer-dashboard Change-Id: Ib36692f0e9e68ed7fa0cd47919ba6581c9c8ab57
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