From 44daaf87fab28bbd5e8703a85f4cfbacc8a76666 Mon Sep 17 00:00:00 2001
From: Dmitry Ilyin <dima@doty.ru>
Date: Tue, 3 Sep 2019 21:35:07 +0300
Subject: [PATCH] Performance fix: added capacity parameter in ArrayLists
 contructor when adding elements

---
 config/src/main/java/com/typesafe/config/impl/ConfigParser.java | 2 +-
 .../main/java/com/typesafe/config/impl/SimpleConfigOrigin.java  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/config/src/main/java/com/typesafe/config/impl/ConfigParser.java b/config/src/main/java/com/typesafe/config/impl/ConfigParser.java
index cce54163..1e562ace 100644
--- a/config/src/main/java/com/typesafe/config/impl/ConfigParser.java
+++ b/config/src/main/java/com/typesafe/config/impl/ConfigParser.java
@@ -59,7 +59,7 @@ final class ConfigParser {
             if (flavor == ConfigSyntax.JSON)
                 throw new ConfigException.BugOrBroken("Found a concatenation node in JSON");
 
-            List<AbstractConfigValue> values = new ArrayList<AbstractConfigValue>();
+            List<AbstractConfigValue> values = new ArrayList<AbstractConfigValue>(n.children().size());
 
             for (AbstractConfigNode node : n.children()) {
                 AbstractConfigValue v = null;
diff --git a/config/src/main/java/com/typesafe/config/impl/SimpleConfigOrigin.java b/config/src/main/java/com/typesafe/config/impl/SimpleConfigOrigin.java
index a3dc3e4d..9e05f9e9 100644
--- a/config/src/main/java/com/typesafe/config/impl/SimpleConfigOrigin.java
+++ b/config/src/main/java/com/typesafe/config/impl/SimpleConfigOrigin.java
@@ -364,7 +364,7 @@ final class SimpleConfigOrigin implements ConfigOrigin {
             Iterator<? extends ConfigOrigin> i = stack.iterator();
             return mergeTwo((SimpleConfigOrigin) i.next(), (SimpleConfigOrigin) i.next());
         } else {
-            List<SimpleConfigOrigin> remaining = new ArrayList<SimpleConfigOrigin>();
+            List<SimpleConfigOrigin> remaining = new ArrayList<SimpleConfigOrigin>(stack.size());
             for (ConfigOrigin o : stack) {
                 remaining.add((SimpleConfigOrigin) o);
             }