Ticket #7101: test_memleak.py

# Open an atomic model and close it 100 times and a lot of memory is leaked.
# This makes it hard to run nogui scripts on entire Protein Databank.
#
# Test memory use: chimerax --nogui --silent
# Then command "open test_memleak.py"
#
# Starting chimerax in nogui on macOS 12.4 gives 68 Mbytes memory use reported by Mac Activity Monitor.
# For small structure 17gs (0.38 MB cif file) memory use goes to 145 Mbytes.
# For larger structure 7azs (42 MB cif file) memory use goes to 526 Mbytes.
# For a PDB format file 1s72 (9 MB pdb file) memory use goes to 1450 Mbytes.
# For EMDB map 1080 (4 MB ccp4 file) memory use goes to 71 Mbyte.
# For 7azs opening without adding to open models memory use goes to 280 Mbytes.
#
n = 100
from time import time
from chimerax.core.commands import run
from chimerax.mmcif import open_mmcif
#import gc
path = '/Users/goddard/Downloads/ChimeraX/PDB/7azs.cif'
for i in range(n):
    t0 = time()
#    models = run(session, 'open 17gs')
    models = run(session, 'open 7azs')
#    models = run(session, 'open 1s72 format pdb')
#    models = run(session, 'open 1080 from emdb')
    session.models.close(models)
#    models = open_mmcif(session, path)[0]
#    for s in models:
#        s.delete()
    t1 = time()
    if i % 10 == 0:
        print ('%d %.2f' % (i, t1-t0))
#        print ('%d %.2f %d' % (i, t1-t0, len(gc.garbage)))