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Add extra performance tests for Nullable floating point Sum

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The existing ones aren't that representative since there isn't
any NULL values, so the branch predictor is correct 100% of the time
This commit is contained in:
Raúl Marín 2021-09-11 22:37:45 +02:00
parent 940e075941
commit 50360aa586
1 changed files with 11 additions and 0 deletions
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tests/performance/sum.xml
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@ -16,4 +16,15 @@
<query>SELECT sum(toNullable(toFloat64(number))) FROM numbers(100000000)</query>
<query>SELECT sumKahan(toNullable(toFloat32(number))) FROM numbers(100000000)</query>
<query>SELECT sumKahan(toNullable(toFloat64(number))) FROM numbers(100000000)</query>
<!-- Create a table with ~20% null values. Make it random so the branch predictor doesn't do all the work -->
<create_query>CREATE TABLE nullfloat32 (x Nullable(Float32)) ENGINE = Memory</create_query>
<fill_query>INSERT INTO nullfloat32
SELECT IF(rand() % 5 == 0, NULL::Nullable(Float32), toFloat32(number)) as x
FROM numbers_mt(200000000)
SETTINGS max_threads = 8
</fill_query>
<query>SELECT sum(x) FROM nullfloat32</query>
<query>SELECT sum(x::Nullable(Float64)) FROM nullfloat32</query>
<drop_query>DROP TABLE IF EXISTS nullfloat32</drop_query>
</test>