package io.debezium.relational;

import io.debezium.text.TokenStream;
import org.openjdk.jmh.annotations.*;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;

@Fork(1)
@State(Scope.Thread)
@Warmup(iterations = 5, time = 1)
@Measurement(iterations = 5, time = 1)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@BenchmarkMode({Mode.AverageTime})
public class TableIdParserPerf {

    @Param({
            "table", "\"\"\"table\"\"\"",
            "database.schema.table", "\"\"\"database\"\"\".\"\"\"schema\"\"\".\"\"\"table\"\"\""
    })
    private String value;

    @Benchmark
    public void benchmark_v1_replaceAll() {
        TokenStream stream = new TokenStream(value, new TableIdParser.TableIdTokenizer(value), true);
        stream.start();
        List<String> parts = new ArrayList<>();
        while (stream.hasNext()) {
            parts.add(stream.consume().replaceAll("''", "'").replaceAll("\"\"", "\"").replaceAll("``", "`"));
        }
    }

}

-- Java 8
Benchmark                                                                  (value)  Mode  Cnt     Score     Error  Units
TableIdParserPerf.benchmark_v1_replaceAll                                    table  avgt    5   543.088 ±  21.374  ns/op
TableIdParserPerf.benchmark_v1_replaceAll                              """table"""  avgt    5   798.946 ± 259.624  ns/op
TableIdParserPerf.benchmark_v1_replaceAll                    database.schema.table  avgt    5  1650.824 ±  54.234  ns/op
TableIdParserPerf.benchmark_v1_replaceAll  """database"""."""schema"""."""table"""  avgt    5  2327.782 ±  51.957  ns/op

-- Java 11
Benchmark                                                                  (value)  Mode  Cnt     Score     Error  Units
TableIdParserPerf.benchmark_v1_replaceAll                                    table  avgt    5   601.808 ±  14.228  ns/op
TableIdParserPerf.benchmark_v1_replaceAll                              """table"""  avgt    5   797.075 ±  18.719  ns/op
TableIdParserPerf.benchmark_v1_replaceAll                    database.schema.table  avgt    5  1820.684 ±  32.619  ns/op
TableIdParserPerf.benchmark_v1_replaceAll  """database"""."""schema"""."""table"""  avgt    5  2434.282 ± 197.290  ns/op

-- Java 17
Benchmark                                                                  (value)  Mode  Cnt     Score    Error  Units
TableIdParserPerf.benchmark_v1_replaceAll                                    table  avgt    5   569.806 ± 20.406  ns/op
TableIdParserPerf.benchmark_v1_replaceAll                              """table"""  avgt    5   760.002 ± 18.795  ns/op
TableIdParserPerf.benchmark_v1_replaceAll                    database.schema.table  avgt    5  1743.369 ± 28.877  ns/op
TableIdParserPerf.benchmark_v1_replaceAll  """database"""."""schema"""."""table"""  avgt    5  2301.432 ± 36.062  ns/op