Entity access check results can cause memory exhaustion during sitemap generation

Running performance_test.php with 55k entities.

Before:

 [info] Running memory usage tests:
 [info] Executing: /var/www/vendor/bin/drush batch-process 1238 --uri=http://example.com
>  [notice] Memory: 97.2 MB, non-peak mem: 90.5 MB
>  [notice] Memory: 122.45 MB, non-peak mem: 114.5 MB
>  [notice] Memory: 137.77 MB, non-peak mem: 127.5 MB
>  [notice] Memory: 150.63 MB, non-peak mem: 137.5 MB
>  [notice] Memory: 156.25 MB, non-peak mem: 143.5 MB
>  [notice] Memory: 166.26 MB, non-peak mem: 153.5 MB
>  [notice] Memory: 166.26 MB, non-peak mem: 153.5 MB
 [info] Generation completed in: 95.36 seconds
 [info] Executing: /var/www/vendor/bin/drush batch-process 1239 --uri=http://example.com
>  [notice] Memory: 94.5 MB, non-peak mem: 92.5 MB
>  [notice] Memory: 146.19 MB, non-peak mem: 135.5 MB
>  [notice] Memory: 168 MB, non-peak mem: 163.5 MB
 [info] Generation completed in: 44.71 seconds
 [info] Running query count tests:
 [info] Executing: /var/www/vendor/bin/drush batch-process 1240 --uri=http://example.com
>  [notice] Query count: 20212
>  [notice] Query count: 40563
>  [notice] Query count: 56204
>  [notice] Query count: 67989
>  [notice] Query count: 79562
>  [notice] Query count: 91456
>  [notice] Query count: 103885
>  [notice] Query count: 116314
>  [notice] Query count: 118477
 [info] Generation completed in: 127 seconds
 [info] Executing: /var/www/vendor/bin/drush batch-process 1241 --uri=http://example.com
>  [notice] Query count: 21904
>  [notice] Query count: 61511
>  [notice] Query count: 97748
>  [notice] Query count: 112545
 [info] Generation completed in: 52.29 seconds

After:

 [info] Running memory usage tests:
 [info] Executing: /var/www/vendor/bin/drush batch-process 1253 --uri=http://example.com
>  [notice] Memory: 72.5 MB, non-peak mem: 68.5 MB
>  [notice] Memory: 80.42 MB, non-peak mem: 72.5 MB
>  [notice] Memory: 84.71 MB, non-peak mem: 73 MB
>  [notice] Memory: 84.71 MB, non-peak mem: 73 MB
>  [notice] Memory: 89.24 MB, non-peak mem: 75 MB
>  [notice] Memory: 89.24 MB, non-peak mem: 75 MB
>  [notice] Memory: 89.24 MB, non-peak mem: 75 MB
 [info] Generation completed in: 93.93 seconds
 [info] Executing: /var/www/vendor/bin/drush batch-process 1254 --uri=http://example.com
>  [notice] Memory: 86.5 MB, non-peak mem: 84.5 MB
>  [notice] Memory: 97.25 MB, non-peak mem: 87 MB
>  [notice] Memory: 97.25 MB, non-peak mem: 89 MB
 [info] Generation completed in: 42.31 seconds
 [info] Running query count tests:
 [info] Executing: /var/www/vendor/bin/drush batch-process 1255 --uri=http://example.com
>  [notice] Query count: 20426
>  [notice] Query count: 42275
>  [notice] Query count: 55988
>  [notice] Query count: 67882
>  [notice] Query count: 79134
>  [notice] Query count: 91135
>  [notice] Query count: 103350
>  [notice] Query count: 115028
>  [notice] Query count: 118477
 [info] Generation completed in: 129.34 seconds
 [info] Executing: /var/www/vendor/bin/drush batch-process 1256 --uri=http://example.com
>  [notice] Query count: 22006
>  [notice] Query count: 64367
>  [notice] Query count: 103872
>  [notice] Query count: 112545
 [info] Generation completed in: 49.01 seconds

Automatically closed - issue fixed for 2 weeks with no activity.