Memory leak with MaskDetectors when giving a MaskedWorkspace

[Martyn Gigg]

When using MaskDetectors with a MaskedWorkspace there seems to be sizeable memory leak. The script below will end up consuming over 6 Gb of memory even though a MARI workspace is a few hundred Mb. Commenting out the MaskDetectors line brings the memory udner control.

This is causing the system tests to fail on Windows at the moment.

raw = LoadRaw('MAR11060.raw')
white_int = Integration(raw)

tiny = 0.01
large = 50000.

#banks = [(1,17280),(17281,18432),(18433,32256),(32257,41472)]
banks = [(1,230),(231,460),(461,690),(691,922)]

for i in range(5):
	for bank in banks:
		start_index = bank[0] - 1
		end_index = bank[1] - 1
		white_masks, num_failed = FindDetectorsOutsideLimits(white_int, StartWorkspaceIndex=start_index,
										  EndWorkspaceIndex=end_index,
									          HighThreshold=large, LowThreshold=tiny)
		MaskDetectors(white_int,MaskedWorkspace=white_masks,StartWorkspaceIndex=start_index,EndworkspaceIndex=end_index)

[Martyn Gigg]

Refs #4886. Workspace history only keeps unique algorithms.

The leak was due to the workspace history exponentially increasing in size. This history was duplicated with each run and then one algorithm added. The history is now in a set and only those algorithms that have not been run before are added.

Changeset: 460038485fdff1342ccc944e15857b0a80f13799

[Martyn Gigg]

Refs #4886. Missed an include.

Changeset: 64dafdf1692240105618ac9c004af37d640b20ff

[Roman Tolchenov]

Ran the script, didn't see any increase in memory.

[Stuart Campbell]

This ticket has been transferred to github issue ​5732