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Improve MapDB read performance by using cached hash code

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With existing implementation, the hashcode of LispEidRecord
should always be recaluclated when we lookup MapDB.
If we have very large number of entries stored in a HashMap,
the performance becomes very poor.
With this cached hashcode implementation, we can improve
the MapDB lookup performance.

Change-Id: Ie193e0b96b2bdc470e52f6f1de4f341527e0507d
This commit is contained in:
Jian Li 2017-05-12 02:12:49 +09:00
parent 24d9be7431
commit b25fcb4de1
1 changed files with 5 additions and 1 deletions
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6
protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/protocols/LispEidRecord.java
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@ -35,6 +35,9 @@ public final class LispEidRecord {
private final byte maskLength;
private final LispAfiAddress prefix;
// Cache the hash code for the string, default to 0
private final int hash;
/**
* Initializes LispEidRecord with mask length and EID prefix.
*
@ -47,6 +50,7 @@ public final class LispEidRecord {
checkNotNull(prefix, "Must specify an address prefix");
this.prefix = prefix;
this.hash = 31 * 17 + Objects.hashCode(maskLength, prefix);
}
/**
@ -90,7 +94,7 @@ public final class LispEidRecord {
@Override
public int hashCode() {
return Objects.hashCode(maskLength, prefix);
return hash;
}
/**