[GitHub] [beam] pabloem commented on a change in pull request #14046: [BEAM-11791] Adding a microbenchmark for TestStream

[GitBox <gi...@apache.org>]

pabloem commented on a change in pull request #14046:
URL: https://github.com/apache/beam/pull/14046#discussion_r582220228



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File path: sdks/python/apache_beam/tools/teststream_microbenchmark.py
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@@ -0,0 +1,129 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""A microbenchmark for measuring changes in the performance of TestStream
+running locally.
+This microbenchmark attempts to measure the overhead of the main data paths
+for the TestStream. Specifically new elements, watermark changes and processing
+time advances.
+
+This runs a series of N parallel pipelines with M parallel stages each. Each
+stage does the following:
+
+1) Put all the PCollection elements in state
+2) Set a timer for the future
+3) When the timer fires, change the key and output all the elements downstream
+
+This executes the same codepaths that are run on the Fn API (and Dataflow)
+workers, but is generally easier to run (locally) and more stable..

Review comment:
       done.




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