From 888d25f7ea10a752fd1d3b8cb6554aaa1f0f7eaf Mon Sep 17 00:00:00 2001
From: ahr <ahr@ahr.local>
Date: Sat, 23 Dec 2017 09:42:08 +0100
Subject: [PATCH] trim docIdToDoc list

This reduces memory usage by 1 or 2 MB.
33% of an ArrayList can be free. If the list is 1 million entries long,
then the list wastes 2.6 MB.
The Doc objects in the list are much bigger.
---
 .../main/java/org/lucares/pdb/datastore/internal/DataStore.java  | 1 +
 1 file changed, 1 insertion(+)

diff --git a/data-store/src/main/java/org/lucares/pdb/datastore/internal/DataStore.java b/data-store/src/main/java/org/lucares/pdb/datastore/internal/DataStore.java
index b0c3fd1..8dfa82f 100644
--- a/data-store/src/main/java/org/lucares/pdb/datastore/internal/DataStore.java
+++ b/data-store/src/main/java/org/lucares/pdb/datastore/internal/DataStore.java
@@ -70,6 +70,7 @@ public class DataStore {
 
 		});
 		trimIntLists();
+		((ArrayList<Doc>)docIdToDoc).trimToSize();
 	}
 
 	private void cacheTagToFileMapping(final Tags tags, final Path path) {