Add parser stress test

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/stresstest/StressTestParserTest.java

@@ -0,0 +1,54 @@
+package ca.uhn.fhir.jpa.stresstest;
+
+import ca.uhn.fhir.context.FhirContext;
+import ca.uhn.fhir.test.BaseTest;
+import ca.uhn.fhir.util.StopWatch;
+import org.hl7.fhir.instance.model.api.IBaseResource;
+import org.hl7.fhir.r4.model.Bundle;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+public class StressTestParserTest extends BaseTest {
+
+	private static final Logger ourLog = LoggerFactory.getLogger(StressTestParserTest.class);
+
+	@Test
+	public void test() throws IOException {
+		FhirContext ctx = FhirContext.forR4();
+		String input = loadResource("/org/hl7/fhir/r4/model/valueset/valuesets.xml");
+
+		String json = ctx.newJsonParser().encodeResourceToString(ctx.newXmlParser().parseResource(input));
+
+		StopWatch sw = null;
+		int loops = 100;
+
+		for (int i = 0; i < loops; i++) {
+			ctx.newXmlParser().parseResource(input);
+			if (i < 50) {
+				ourLog.info("Parsed XML {} times", i);
+				continue;
+			} else if (i == 50) {
+				sw = new StopWatch();
+				continue;
+			}
+			ourLog.info("Parsed XML {} times - {}ms/pass", i, sw.getMillisPerOperation(i - 50));
+		}
+
+		for (int i = 0; i < loops; i++) {
+			Bundle parsed = (Bundle) ctx.newJsonParser().parseResource(json);
+			if (i < 50) {
+				ourLog.info("Parsed JSON with {} entries {} times", parsed.getEntry().size(), i);
+				continue;
+			} else if (i == 50) {
+				sw = new StopWatch();
+				continue;
+			}
+			ourLog.info("Parsed JSON {} times - {}ms/pass", i, sw.getMillisPerOperation(i - 50));
+		}
+
+
+	}
+}