avoid allocation for legacy servers (#1891)

elastic · Jun 30, 2021 · 48d697e · 48d697e
1 parent 369598c
commit 48d697e
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/apm-agent-core/src/main/java/co/elastic/apm/agent/report/serialize/DslJsonSerializer.java b/apm-agent-core/src/main/java/co/elastic/apm/agent/report/serialize/DslJsonSerializer.java
@@ -1184,7 +1184,12 @@ private void serializeUrl(final Url url) {
             writeField("port", port);
         } else {
             // serialize as a string for compatibility
-            writeField("port", Integer.toString(port));
+            // doing it in low-level to avoid allocation
+            writeFieldName("port", jw);
+            jw.writeByte(QUOTE);
+            NumberConverter.serialize(port, jw);
+            jw.writeByte(QUOTE);
+            jw.writeByte(COMMA);
         }
         writeField("pathname", url.getPathname());
         writeField("search", url.getSearch());