ClickHouse/tests/performance/empty_string_serialization.xml

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<test>
<!-- gcc-8 generates 20% faster code than gcc-9
clang-8 generates more than two times slower code than gcc
-->
<create_query>CREATE TABLE empty_strings (s String) ENGINE = Log;</create_query>
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<query>INSERT INTO empty_strings SELECT '' FROM zeros(100000000);</query>
<drop_query>DROP TABLE IF EXISTS empty_strings</drop_query>
</test>