我尝试使用以下代码测试IndexedDB的性能。 该代码修改自http://www.html5rocks.com/en/tutorials/indexeddb/todo/，在Chrome中运行良好，但在Firefox 10中失败，并显示“db.setVersion不是一个函数”。 我想知道如何修改代码以使其在Firefox中正常工作？
var count=0;
var MAX=10;
var times=3;
var allTime;
var stime;
var etime;
var html5rocks = {};
var indexedDB = window.indexedDB || window.webkitIndexedDB ||
window.mozIndexedDB;
if ('webkitIndexedDB' in window) {
window.IDBTransaction = window.webkitIDBTransaction;
window.IDBKeyRange = window.webkitIDBKeyRange;
}
html5rocks.indexedDB = {};
html5rocks.indexedDB.db = null;
html5rocks.indexedDB.onerror = function(e) {
//console.log(e);
alert("Why didn't you allow my web app to use IndexedDB?!");
};
html5rocks.indexedDB.open = function(type) {
var request = indexedDB.open("todos");
request.onsuccess = function(e) {
var v = "1.20";
html5rocks.indexedDB.db = e.target.result;
var db = html5rocks.indexedDB.db;
// We can only create Object stores in a setVersion transaction;
if (v!= db.version) {
var setVrequest = db.setVersion(v);
// onsuccess is the only place we can create Object Stores
setVrequest.onerror = html5rocks.indexedDB.onerror;
setVrequest.onsuccess = function(e) {
if(db.objectStoreNames.contains("todo")) {
db.deleteObjectStore("todo");
}
var store = db.createObjectStore("todo",
{keyPath: "number"});
addTest();
};
}
else addTest();
};
request.onerror = html5rocks.indexedDB.onerror;
}
html5rocks.indexedDB.addTodo = function(todoText,num) {
var db = html5rocks.indexedDB.db;
var trans = db.transaction(["todo"], IDBTransaction.READ_WRITE);
var store = trans.objectStore("todo");
var data = {
"text": todoText,
"number": num
};
var request = store.put(data);
request.onsuccess = function(e) {
count++;
if(count>=times*MAX)
{
etime=new Date;
var t=document.getElementById('result').innerHTML;
document.getElementById('result').innerHTML=t+((etime.valueOf()-stime.valueOf())/times)+"<br/>";
allTime=0;stime=new Date;count=0;
getTest();
}
};
request.onerror = function(e) {
console.log("Error Adding: ", e);
};
};
html5rocks.indexedDB.getTodo = function(id) {
var db = html5rocks.indexedDB.db;
var trans = db.transaction(["todo"], IDBTransaction.READ_WRITE);
var store = trans.objectStore("todo");
var request = store.get(id);
request.onsuccess = function(e) {
count++;
if(count>=times*MAX)
{
etime=new Date;
var t=document.getElementById('result').innerHTML;
document.getElementById('result').innerHTML=t+((etime.valueOf()-stime.valueOf())/times)+"<br/>";
allTime=0;stime=new Date;count=0;
delTest();
}
};
request.onerror = function(e) {
console.log("Error getting: ", e);
};
};
html5rocks.indexedDB.deleteTodo = function(id) {
var db = html5rocks.indexedDB.db;
var trans = db.transaction(["todo"], IDBTransaction.READ_WRITE);
var store = trans.objectStore("todo");
var request = store.delete(id);
request.onsuccess = function(e) {
count++;
if(count>=times*MAX)
{
etime=new Date;
var t=document.getElementById('result').innerHTML;
document.getElementById('result').innerHTML=t+((etime.valueOf()-stime.valueOf())/times)+"<br/>";
allTime=0;stime=new Date;count=0;
dataTest();
}
};
request.onerror = function(e) {
console.log("Error Adding: ", e);
};
};
html5rocks.indexedDB.addData = function(d) {
var db = html5rocks.indexedDB.db;
var trans = db.transaction(["todo"], IDBTransaction.READ_WRITE);
var store = trans.objectStore("todo");
var data={
"text":d,
"number":1
};
var request = store.put(data);
request.onsuccess = function(e) {
etime=new Date;
var t=document.getElementById('result').innerHTML;
document.getElementById('result').innerHTML=t+((etime.valueOf()-stime.valueOf()))+"<br/>";
};
request.onerror = function(e) {
console.log("Error Adding: ", e);
};
};
function addTest() {
for(i=1;i<=times*MAX;i++)
html5rocks.indexedDB.addTodo(' ',i);
}
function getTest() {
for(i=1;i<=times*MAX;i++)
html5rocks.indexedDB.getTodo(Math.round(Math.random()*(MAX*times-1)+1));
}
function delTest() {
for(i=1;i<=times*MAX;i++)
html5rocks.indexedDB.deleteTodo(i);
}
function dataTest() {
data=' ';
for(i=1;i<=21;i++)
data=data+data;
stime=new Date
html5rocks.indexedDB.addData(data);
}
function init() {
stime=new Date;
allTime=0;
html5rocks.indexedDB.open();
}