Rewrite "performance" test to JMH benchmarks

This commit rewrites the remaining "fastEnough" performance tests into
proper JMH benchmarks.

See gh-24830

spring-web/src/jmh/java/org/springframework/web/bind/ServletRequestUtilsBenchmark.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.web.bind;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+
+import org.springframework.web.testfixture.servlet.MockHttpServletRequest;
+
+
+/**
+ * Benchmarks for extracting parameters from {@libnk ServletRequest}.
+ * @author Brian Clozel
+ */
+@BenchmarkMode(Mode.Throughput)
+public class ServletRequestUtilsBenchmark {
+
+	@State(Scope.Benchmark)
+	public static class BenchmarkData {
+
+		public MockHttpServletRequest request = new MockHttpServletRequest();
+
+		public String parameterName = "nonExistingParam";
+	}
+
+	@Benchmark
+	public int intParameterWithDefaultValue(BenchmarkData data) {
+		return ServletRequestUtils.getIntParameter(data.request, data.parameterName, 0);
+	}
+
+	@Benchmark
+	public long longParameterWithDefaultValue(BenchmarkData data) {
+		return ServletRequestUtils.getLongParameter(data.request, data.parameterName, 0);
+	}
+
+	@Benchmark
+	public float floatParameterWithDefaultValue(BenchmarkData data) {
+		return ServletRequestUtils.getFloatParameter(data.request, data.parameterName, 0f);
+	}
+
+	@Benchmark
+	public double doubleParameterWithDefaultValue(BenchmarkData data) {
+		return ServletRequestUtils.getDoubleParameter(data.request, data.parameterName, 0d);
+	}
+
+	@Benchmark
+	public boolean booleanParameterWithDefaultValue(BenchmarkData data) {
+		return ServletRequestUtils.getBooleanParameter(data.request, data.parameterName, false);
+	}
+
+
+	@Benchmark
+	public String stringParameterWithDefaultValue(BenchmarkData data) {
+		return ServletRequestUtils.getStringParameter(data.request, data.parameterName, "defaultValue");
+	}
+
+}