Opened 10 years ago
Last modified 8 years ago
#48 new enhancement
Further efficiency savings in integral code
| Reported by: | Thomas Latham | Owned by: | Thomas Latham |
|---|---|---|---|
| Priority: | major | Milestone: | v4r0 |
| Version: | Keywords: | ||
| Cc: |
Description
As mentioned in comment:27:ticket:11 there are still some large savings that could be made in the recalculation of the integrals. These should be investigated and implemented if feasible.
Change History (4)
comment:1 Changed 9 years ago by
comment:2 Changed 8 years ago by
| Milestone: | v3r1 → v4r0 |
|---|
comment:3 Changed 8 years ago by
Have separated the issue of narrow resonances in m12 into a new ticket #65.
comment:4 Changed 8 years ago by
Caching the full kinematics will require moving the per-event information data members currently in LauKinematics into a POD object in order to minimise memory usage. LauKinematics can then own one of those objects (or even a pointer to one in order to avoid copying?). Should also try and reduce the memory consumed by other parts of the code - ticket #14 should help with this. So these tickets should probably be addressed together.
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In addition to caching the full kinematics, it would help if Laura could automatically choose the axes of the integration DP (independently of the efficiency/background (S)DP) to avoid putting narrow resonances on the diagonal whenever possible (with a method to manually force a particular DP if desired by the user).
For the D* in B0->D0Kpi with default integration settings, changing the order of the daughters can currently lead to a ~5-10x change in CPU time.