1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/netwerk/test/TestCachePerformance.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,198 @@
1.4 +var DEBUG = true;
1.5 +
1.6 +var clientID = "javascript";
1.7 +var nsICache = Components.interfaces.nsICache;
1.8 +
1.9 +function getCacheService()
1.10 +{
1.11 + var nsCacheService = Components.classes["@mozilla.org/network/cache-service;1"];
1.12 + var service = nsCacheService.getService(Components.interfaces.nsICacheService);
1.13 + return service;
1.14 +}
1.15 +
1.16 +function createCacheSession(clientID, storagePolicy, streamable)
1.17 +{
1.18 + var service = getCacheService();
1.19 + var session = service.createSession(clientID, storagePolicy, streamable);
1.20 + return session;
1.21 +}
1.22 +
1.23 +function openCacheEntry(url, mode)
1.24 +{
1.25 + var session = createCacheSession(clientID, nsICache.STORE_ON_DISK, true);
1.26 + var entry = session.openCacheEntry(url, mode);
1.27 + return entry;
1.28 +}
1.29 +
1.30 +function wrapInputStream(input)
1.31 +{
1.32 + var nsIScriptableInputStream = Components.interfaces.nsIScriptableInputStream;
1.33 + var factory = Components.classes["@mozilla.org/scriptableinputstream;1"];
1.34 + var wrapper = factory.createInstance(nsIScriptableInputStream);
1.35 + wrapper.init(input);
1.36 + return wrapper;
1.37 +}
1.38 +
1.39 +function getIOService()
1.40 +{
1.41 + var CID = Components.classes["@mozilla.org/network/io-service;1"];
1.42 + var service = CID.getService(Components.interfaces.nsIIOService);
1.43 + return service;
1.44 +}
1.45 +
1.46 +function downloadHTTP(spec)
1.47 +{
1.48 + var ioService = getIOService();
1.49 + var uri = ioService.newURI(spec, null, null);
1.50 + var channel = ioService.newChannelFromURI(uri);
1.51 + var input = wrapInputStream(channel.open());
1.52 + var data = input.read(input.available());
1.53 + input.close();
1.54 + return data;
1.55 +}
1.56 +
1.57 +function download(url)
1.58 +{
1.59 + var data = "";
1.60 + var buffer = java.lang.reflect.Array.newInstance(java.lang.Byte.TYPE, 65536);
1.61 + var stream = url.getContent();
1.62 + while (true) {
1.63 + var count = stream.read(buffer);
1.64 + if (count <= 0)
1.65 + break;
1.66 + var str = new java.lang.String(buffer, 0, count);
1.67 + data += str;
1.68 + }
1.69 + stream.close();
1.70 + return data;
1.71 +}
1.72 +
1.73 +function write(url, data)
1.74 +{
1.75 + var key = url.toString();
1.76 + var outputEntry = openCacheEntry(key, nsICache.ACCESS_WRITE);
1.77 + var output = outputEntry.transport.openOutputStream(0, -1, 0);
1.78 + var count = output.write(data, data.length);
1.79 +
1.80 + // store some metadata.
1.81 + outputEntry.setMetaDataElement("size", data.length);
1.82 +
1.83 + output.close();
1.84 + outputEntry.markValid();
1.85 + outputEntry.close();
1.86 +
1.87 + return count;
1.88 +}
1.89 +
1.90 +function read(url)
1.91 +{
1.92 + var key = url.toString();
1.93 + var inputEntry = openCacheEntry(key, nsICache.ACCESS_READ);
1.94 + var input = wrapInputStream(inputEntry.transport.openInputStream(0, -1, 0));
1.95 + var data = input.read(input.available());
1.96 + input.close();
1.97 + inputEntry.close();
1.98 + return data;
1.99 +}
1.100 +
1.101 +function readMetaData(url, element)
1.102 +{
1.103 + var key = url.toString();
1.104 + var inputEntry = openCacheEntry(key, nsICache.ACCESS_READ);
1.105 + var metadata = inputEntry.getMetaDataElement(element);
1.106 + inputEntry.close();
1.107 + return metadata;
1.108 +}
1.109 +
1.110 +function doom(url)
1.111 +{
1.112 + var key = url.toString();
1.113 + var doomedEntry = openCacheEntry(key, nsICache.ACCESS_READ_WRITE);
1.114 + doomedEntry.doom();
1.115 + doomedEntry.close();
1.116 +}
1.117 +
1.118 +function test()
1.119 +{
1.120 + // download some real content from the network.
1.121 + var url = new java.net.URL("http://www.mozilla.org");
1.122 + var key = url.toString();
1.123 + var data = download(url);
1.124 +
1.125 + if (write(url, data) == data.length)
1.126 + print("disk cache write works!");
1.127 + else
1.128 + print("disk cache write broken!");
1.129 +
1.130 + if (read(url) == data)
1.131 + print("disk cache read works!");
1.132 + else
1.133 + print("disk cache read broken!");
1.134 +
1.135 + if (readMetaData(url, "size") == data.length)
1.136 + print("disk cache metadata works!");
1.137 + else
1.138 + print("disk cache metadata broken!");
1.139 +}
1.140 +
1.141 +function median(array)
1.142 +{
1.143 + var cmp = function(x, y) { return x - y; }
1.144 + array.sort(cmp);
1.145 + var middle = Math.floor(array.length / 2);
1.146 + return array[middle];
1.147 +}
1.148 +
1.149 +function sum(array)
1.150 +{
1.151 + var s = 0;
1.152 + var len = array.length;
1.153 + for (var i = 0; i < len; ++i)
1.154 + s += array[i];
1.155 + return s;
1.156 +}
1.157 +
1.158 +function time()
1.159 +{
1.160 + var N = 50;
1.161 + var System = java.lang.System;
1.162 + var url = new java.net.URL("http://www.mozilla.org");
1.163 + var downloadTimes = new Array();
1.164 + for (var i = 0; i < N; ++i) {
1.165 + var begin = System.currentTimeMillis();
1.166 + download(url);
1.167 + var end = System.currentTimeMillis();
1.168 + downloadTimes.push(end - begin);
1.169 + }
1.170 + var downloadTotal = sum(downloadTimes);
1.171 + var downloadMean = downloadTotal / N;
1.172 + var downloadMedian = median(downloadTimes);
1.173 + print("" + N + " downloads took " + downloadTotal + " milliseconds.");
1.174 + print("mean = " + downloadMean + " milliseconds.");
1.175 + print("median = " + downloadMedian + " milliseconds.");
1.176 +
1.177 + var readTimes = new Array();
1.178 + for (var i = 0; i < N; ++i) {
1.179 + var begin = System.currentTimeMillis();
1.180 + read(url);
1.181 + var end = System.currentTimeMillis();
1.182 + readTimes.push(end - begin);
1.183 + }
1.184 + var readTotal = sum(readTimes);
1.185 + var readMean = readTotal / N;
1.186 + var readMedian = median(readTimes);
1.187 + print("" + N + " reads took " + readTotal + " milliseconds.");
1.188 + print("mean = " + readMean + " milliseconds.");
1.189 + print("median = " + readMedian + " milliseconds.");
1.190 +}
1.191 +
1.192 +// load the cache service before doing anything with Java...
1.193 +getCacheService();
1.194 +
1.195 +if (DEBUG) {
1.196 + print("cache service loaded.");
1.197 +} else {
1.198 + print("running disk cache test.");
1.199 + test();
1.200 + print("disk cache test complete.");
1.201 +}
