ClickHouse/dbms/tests/performance/trim_whitespace.xml

<test>
    <type>loop</type>

    <create_query>CREATE TABLE IF NOT EXISTS whitespaces(value String) ENGINE = MergeTree() PARTITION BY tuple() ORDER BY tuple()</create_query>
    <fill_query>INSERT INTO whitespaces SELECT value FROM (SELECT arrayStringConcat(groupArray(' ')) AS spaces, concat(spaces, toString(any(number)), spaces) AS value FROM numbers(100000000) GROUP BY pow(number, intHash32(number) % 4) % 12345678)</fill_query>

    <stop_conditions>
        <all_of>
            <total_time_ms>30000</total_time_ms>
        </all_of>
    </stop_conditions>

    <main_metric>
        <min_time/>
    </main_metric>

    <substitutions>
        <substitution>
           <name>func</name>
           <values>
               <value>value</value>
               <value>trimLeft(value)</value>
               <value>trimRight(value)</value>
               <value>trimBoth(value)</value>
               <value>replaceRegexpOne(value, '^ *', '')</value>
               <value>replaceRegexpOne(value, ' *$', '')</value>
               <value>replaceRegexpAll(value, '^ *| *$', '')</value>
           </values>
       </substitution>
    </substitutions>

    <query>SELECT count() FROM whitespaces WHERE NOT ignore({func})</query>

    <drop_query>DROP TABLE IF EXISTS whitespaces</drop_query>
</test>