ClickHouse/tests/performance/empty_string_serialization.xml

<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>
    <query>INSERT INTO empty_strings SELECT '' FROM zeros(100000000);</query>
    <drop_query>DROP TABLE IF EXISTS empty_strings</drop_query>
</test>
Adjust ignored perf test changes after NUMA binding 2020-10-30 15:12:15 +00:00			`<test>`
Added performance test to show degradation of performance in gcc-9 in more isolated way 2019-08-02 20:18:03 +00:00

			`<!-- 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>`
Update perftest after zeros. 2020-03-11 11:22:10 +00:00			`<query>INSERT INTO empty_strings SELECT '' FROM zeros(100000000);</query>`
Added performance test to show degradation of performance in gcc-9 in more isolated way 2019-08-02 20:18:03 +00:00			`<drop_query>DROP TABLE IF EXISTS empty_strings</drop_query>`
			`</test>`