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hostlist: improve hash perf.

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This commit is contained in:
Christopher Jeffrey 2017-01-30 15:44:29 -08:00
parent 4740a2fff3
commit 9cd70fb589
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GPG Key ID: 8962AB9DE6666BBD
1 changed files with 7 additions and 12 deletions
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19
lib/net/hostlist.js
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@ -271,17 +271,12 @@ HostList.prototype.getHost = function getHost() {
*/ */
HostList.prototype.freshBucket = function freshBucket(entry) { HostList.prototype.freshBucket = function freshBucket(entry) {
var size = 0; var addr = entry.addr;
var bw, hash, index; var src = entry.src;
var data, hash, index;
size += entry.addr.host.length; data = util.concat(addr.raw, src.raw);
size += entry.src.host.length; hash = murmur3(data, 0xfba4c795);
bw = new StaticWriter(size);
bw.writeString(entry.addr.host, 'ascii');
bw.writeString(entry.src.host, 'ascii');
hash = murmur3(bw.render(), 0xfba4c795);
index = hash % this.fresh.length; index = hash % this.fresh.length;
return this.fresh[index]; return this.fresh[index];
@ -295,8 +290,8 @@ HostList.prototype.freshBucket = function freshBucket(entry) {
*/ */
HostList.prototype.usedBucket = function usedBucket(entry) { HostList.prototype.usedBucket = function usedBucket(entry) {
var data = new Buffer(entry.addr.host, 'ascii'); var addr = entry.addr;
var hash = murmur3(data, 0xfba4c795); var hash = murmur3(addr.raw, 0xfba4c795);
var index = hash % this.used.length; var index = hash % this.used.length;
return this.used[index]; return this.used[index];
}; };