Add isolated performance test

tests/performance/sparse_column_filter.xml

@@ -0,0 +1,42 @@
+<test>
+    <substitutions>
+        <substitution>
+            <name>serialization</name>
+            <values>
+                <value>sparse</value>
+            </values>
+        </substitution>
+        <substitution>
+            <name>ratio</name>
+            <values>
+                <value>10</value>
+                <value>100</value>
+                <value>1000</value>
+            </values>
+        </substitution>
+    </substitutions>
+
+    <create_query>
+        CREATE TABLE test_{serialization}_{ratio} (id UInt64, u8 UInt8, u64 UInt64, str String)
+        ENGINE = MergeTree ORDER BY id
+        SETTINGS ratio_of_defaults_for_sparse_serialization = 0.8
+    </create_query>
+
+    <create_query>SYSTEM STOP MERGES test_{serialization}_{ratio}</create_query>
+
+    <fill_query>
+        INSERT INTO test_{serialization}_{ratio} SELECT
+            number,
+            number % {ratio} = 0 ? rand(1) : 0,
+            number % {ratio} = 0 ? rand(2) : 0,
+            number % {ratio} = 0 ? randomPrintableASCII(64, 3) : ''
+        FROM numbers(100000000)
+    </fill_query>
+
+    <query>SELECT str, COUNT(DISTINCT id) as i FROM test_{serialization}_{ratio} WHERE notEmpty(str) GROUP BY str ORDER BY i DESC LIMIT 10</query>
+    <query>SELECT str, COUNT(DISTINCT u8) as u FROM test_{serialization}_{ratio} WHERE notEmpty(str) GROUP BY str ORDER BY u DESC LIMIT 10</query>
+    <query>SELECT str, COUNT(DISTINCT u64) as u FROM test_{serialization}_{ratio} WHERE notEmpty(str) GROUP BY str ORDER BY u DESC LIMIT 10</query>
+
+
+    <drop_query>DROP TABLE IF EXISTS test_{serialization}_{ratio}</drop_query>
+</test>