erik/JSON-java
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Merge pull request #348 from johnjaylward/ArrayPerformance

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Capacity improvements for internal structures
This commit is contained in:
Sean Leary 2017-06-12 02:05:26 -05:00 • committed by GitHub
commit 1add1247fa
3 changed files with 31 additions and 9 deletions
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21
JSONObject.java
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@ -184,7 +184,7 @@ public class JSONObject {
* An array of strings.
*/
public JSONObject(JSONObject jo, String[] names) {
this();
this(names.length);
for (int i = 0; i < names.length; i += 1) {
try {
this.putOnce(names[i], jo.opt(names[i]));
@ -256,8 +256,10 @@ public class JSONObject {
* the JSONObject.
*/
public JSONObject(Map<?, ?> m) {
this.map = new HashMap<String, Object>();
if (m != null) {
if (m == null) {
this.map = new HashMap<String, Object>();
} else {
this.map = new HashMap<String, Object>(m.size());
for (final Entry<?, ?> e : m.entrySet()) {
final Object value = e.getValue();
if (value != null) {
@ -308,7 +310,7 @@ public class JSONObject {
* from the object.
*/
public JSONObject(Object object, String names[]) {
this();
this(names.length);
Class<?> c = object.getClass();
for (int i = 0; i < names.length; i += 1) {
String name = names[i];
@ -377,6 +379,17 @@ public class JSONObject {
}
}
}
/**
* Constructor to specify an initial capacity of the internal map. Useful for library
* internal calls where we know, or at least can best guess, how big this JSONObject
* will be.
*
* @param initialCapacity initial capacity of the internal map.
*/
protected JSONObject(int initialCapacity){
this.map = new HashMap<String, Object>(initialCapacity);
}
/**
* Accumulate values under a key. It is similar to the put method except