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https://issues.apache.org/jira/browse/BEAM-9085?focusedWorklogId=388985&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-388985
]
ASF GitHub Bot logged work on BEAM-9085:
----------------------------------------
Author: ASF GitHub Bot
Created on: 18/Feb/20 18:34
Start Date: 18/Feb/20 18:34
Worklog Time Spent: 10m
Work Description: tvalentyn commented on pull request #10885: [BEAM-9085]
Fix performance regression in SyntheticSource
URL: https://github.com/apache/beam/pull/10885#discussion_r380845955
##########
File path: sdks/python/apache_beam/testing/synthetic_pipeline.py
##########
@@ -415,19 +418,24 @@ def get_range_tracker(self, start_position,
stop_position):
tracker = range_trackers.UnsplittableRangeTracker(tracker)
return tracker
+ @staticmethod
+ def random_bytes(length):
+ """Return random bytes."""
+ return b''.join(
+ (struct.pack('B', random.getrandbits(8)) for _ in xrange(length)))
Review comment:
Let's use range instead of xrange, and adjust the import accordingly. We try
to use idiomatic py3 whenever possible in Beam.
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Issue Time Tracking
-------------------
Worklog Id: (was: 388985)
Time Spent: 0.5h (was: 20m)
> Performance regression in np.random.RandomState() skews performance test
> results across Python 2/3 on Dataflow
> --------------------------------------------------------------------------------------------------------------
>
> Key: BEAM-9085
> URL: https://issues.apache.org/jira/browse/BEAM-9085
> Project: Beam
> Issue Type: Bug
> Components: testing
> Reporter: Kamil Wasilewski
> Assignee: Kamil Wasilewski
> Priority: Major
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Tests show that the performance of core Beam operations in Python 3.x on
> Dataflow can be a few time slower than in Python 2.7. We should investigate
> what's the cause of the problem.
> Currently, we have one ParDo test that is run both in Py3 and Py2 [1]. A
> dashboard with runtime results can be found here [2].
> [1] sdks/python/apache_beam/testing/load_tests/pardo_test.py
> [2] https://apache-beam-testing.appspot.com/explore?dashboard=5678187241537536
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