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https://issues.apache.org/jira/browse/AVRO-1497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14494717#comment-14494717
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Ryan Blue commented on AVRO-1497:
---------------------------------
I ran the performance tests no the current trunk a few times to find out what
the variability in the perf tests looks like. I used a physical machine I had
access to with nothing running on it other than an occasional monitoring
service. I've added the results as a [second page in the
spreadsheet|https://docs.google.com/spreadsheets/d/1wiLHryLOAfxRnkrrNZWJYJloqWUj5r9xPCL4XB8uIo4/edit#gid=1264216576].
18 of the 68 tests had a difference of 5% or more on one if the 4 runs. The
farthest from the average was fairly well balanced across the runs, and the
difference was equally both positive (slower) and negative (faster). The
patterns of behavior I see are:
1. The first run is generally a bit slower, though not always: one test was 13%
faster than any other run, see line 54.
2. The last run was a bit faster in the second half of the run, with several
substantially faster reflection tests
3. The reflect tests and validating tests seem to have the largest variability.
I also ran the logical types code to compare it to the averaged normal runs. It
is significantly slower (see the other sheets) than the average, so I think I
need to do some more work to make this better. I'm not sure why this didn't
show up on my laptop, but it does consistently now.
> Add LogicalType support to Java
> -------------------------------
>
> Key: AVRO-1497
> URL: https://issues.apache.org/jira/browse/AVRO-1497
> Project: Avro
> Issue Type: New Feature
> Components: java
> Reporter: Ryan Blue
> Assignee: Zoltan Farkas
> Fix For: 1.7.8
>
> Attachments: Logical Types Performance Comparison - Sheet1.csv
>
>
> AVRO-1402 updates the Avro spec to include logical types, which are stored as
> existing types but interpreted as others. The next step is to implement
> LogicalType (in Java) that provides tools to attach a logical type to a
> schema, read a logical type, and validate logical types.
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