Trace - The span mini-map is drawn inefficiently

[tiffon]

Requirement - what kind of business use case are you trying to solve?

Efficient initial page-load.

Problem - what in Jaeger blocks you from solving the requirement?

The current implementation of the span mini map in the trace detail view is not efficient for large traces. In profiling a trace with around 10,000 spans, the initialization of the span mini-map took over 1.43 seconds, which is nearly half of the time spent initializing the the page (after the trace data has been loaded).

Proposal - what do you suggest to solve the problem or improve the existing situation?

Optimize the span graph - PR pending.