Performance Optimization on getResultSetValue#773
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Performance Optimization, using ".equals" is signifigantly slower than "==". When using "BeanPropertyRowMapper", we ran load tests and found significant lack of performance when calling "getColumnValue". I noticed that "getColumnValue" simply just calls "JdbcUtils.getResultSetValue". These tests were run on an table with roughly 70 columns. After making change I ran three tests 1) with existing BeanPropertyRowMapper 2) with optimized BeanPropertyRowMapper 3) with a Custom RowMapper, mapped exactly to the class. Benchmark Results ============= 1) round: 0.38 [+- 0.11], round.block: 0.00 [+- 0.00], round.gc: 0.00 [+- 0.00], GC.calls: 1, GC.time: 0.01, time.total: 7.98, time.warmup: 0.28, time.bench: 7.70 2) round: 0.23 [+- 0.02], round.block: 0.00 [+- 0.00], round.gc: 0.00 [+- 0.00], GC.calls: 0, GC.time: 0.00, time.total: 4.80, time.warmup: 0.22, time.bench: 4.58 3) round: 0.22 [+- 0.02], round.block: 0.00 [+- 0.00], round.gc: 0.00 [+- 0.00], GC.calls: 0, GC.time: 0.00, time.total: 4.62, time.warmup: 0.19, time.bench: 4.43 As you can see the optimized version makes BeanPropertyRowMapper almost as fast as a custom made RowMapper.
Contributor
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Could you please create a JIRA issue for this one? We have quite a few equals comparisons between Class references in the codebase, so this might be worth revisiting on a wider scale. In any case, a JIRA issue will make sure it doesn't get lost... Juergen |
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Opened a Ticket: https://jira.spring.io/browse/SPR-12926 |
Contributor
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This PR can be closed, as the corresponding change was performed for the whole codebase in b4095c3 |
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Performance Optimization, using ".equals" is signifigantly slower than "==".
When using "BeanPropertyRowMapper", we ran load tests and found significant lack of performance when calling "getColumnValue". I noticed that "getColumnValue" simply just calls "JdbcUtils.getResultSetValue". These tests were run on an table with roughly 70 columns.
After making change I ran three tests
Benchmark Results
As you can see the optimized version makes BeanPropertyRowMapper almost as fast as a custom made RowMapper.