add test

Author: jimeng

build.gradle

@@ -47,7 +47,6 @@ ext {
     junitVersion = '5.10.2'
     jsoniterScalaVersion = '2.28.4'
     lombokVersion = '1.18.34'
-    jacksonVersion = '2.18.0'
 }
 
 dependencies {
@@ -68,10 +67,6 @@ dependencies {
     testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-params', version: junitVersion
     testRuntimeOnly group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: junitVersion
 
-    // Jackson dependency for jmh
-    implementation group: 'com.fasterxml.jackson.core', name: 'jackson-core', version: jacksonVersion
-    implementation group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: jacksonVersion
-    implementation group: 'com.fasterxml.jackson.core', name: 'jackson-annotations', version: jacksonVersion
 }
 
 tasks.register('downloadTestData') {

src/jmh/java/org/simdjson/Parse2VsJacksonBenchMark.java

@@ -0,0 +1,75 @@
+package org.simdjson;
+
+import java.io.IOException;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+
+import org.checkerframework.checker.units.qual.A;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+
+import com.alibaba.fastjson2.JSON;
+import com.alibaba.fastjson2.JSONObject;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+
+@State(Scope.Benchmark)
+@BenchmarkMode(Mode.Throughput)
+@OutputTimeUnit(TimeUnit.SECONDS)
+public class ParseAndSelectFixPathBenchMark {
+    @Param({"/twitter.json"})
+    String fileName;
+    private byte[] buffer;
+    private final SimdJsonParser parser = new SimdJsonParser();
+    private final ObjectMapper objectMapper = new ObjectMapper();
+    private final SimdJsonParser2 parser2 = new SimdJsonParser2(
+            "statuses.0.user.default_profile", "statuses.0.user.screen_name",
+            "statuses.1.user.default_profile", "statuses.1.user.screen_name",
+            "statuses.2.user.default_profile", "statuses.2.user.screen_name",
+            "statuses.3.user.default_profile", "statuses.3.user.screen_name",
+            "statuses.4.user.default_profile", "statuses.4.user.screen_name",
+            "statuses.5.user.default_profile", "statuses.5.user.screen_name",
+            "statuses.6.user.default_profile", "statuses.6.user.screen_name",
+            "statuses.7.user.default_profile", "statuses.7.user.screen_name",
+            "statuses.8.user.default_profile", "statuses.8.user.screen_name",
+            "statuses.9.user.default_profile", "statuses.9.user.screen_name");
+
+    @Benchmark
+    public String[] parseMultiValuesForFixPaths_SimdJson() {
+        JsonValue jsonValue = parser.parse(buffer, buffer.length);
+        String[] result = new String[20];
+        Iterator<JsonValue> tweets = jsonValue.get("statuses").arrayIterator();
+        int i = 0;
+        while (tweets.hasNext() && i++ < 10) {
+            JsonValue tweet = tweets.next();
+            result[i] = tweet.get("user").get("default_profile").asString();
+            result[i + 1] = tweet.get("user").get("screen_name").asString();
+        }
+        return result;
+    }
+
+    @Benchmark
+    public String[] parseMultiValuesForFixPaths_SimdJson2() {
+        return parser2.parse(buffer, buffer.length);
+    }
+
+    @Benchmark
+    public String[] parseMultiValuesForFixPaths_Jackson() throws IOException {
+        JsonNode jacksonJsonNode = objectMapper.readTree(buffer);
+        String[] result = new String[20];
+        ArrayNode tweets = (ArrayNode) jacksonJsonNode.get("statuses");
+        for (int i = 0; i < 10; i++) {
+            result[i] = tweets.get(i).path("user").path("default_profile").textValue();
+            result[i + 1] = tweets.get(i).path("user").path("screen_name").textValue();
+        }
+        return result;
+    }
+}

src/jmh/java/org/simdjson/ParseAndSelectFixPathBenchMark.java

@@ -26,7 +26,7 @@ public SimdJsonParser(int capacity, int maxDepth) {
         paddedBuffer = new byte[capacity];
         indexer = new StructuralIndexer(bitIndexes);
     }
-    public BitIndexes buildBitIndex (byte[] buffer, int len) {
+    BitIndexes buildBitIndex (byte[] buffer, int len) {
         byte[] padded = padIfNeeded(buffer, len);
         reset();
         stage1(padded, len);