Find bottleneck and thus make code run faster

[nkdnnlr]

Time every function and see which ones use the most time. Check if those functions can be rewritten to gain performance.

[nkdnnlr]

For

• events total: 2501
• batch size: 300 events
• particles: 200

ncalls tottime percall cumtime percall filename:lineno(function)

as expected, measurement update uses most resources, scaling with batch size.