Add more IDB perf tests, including cursor reads and log-style writes.

chrome/test/data/indexeddb/perf_test.js

Index: chrome/test/data/indexeddb/perf_test.js
diff --git a/chrome/test/data/indexeddb/perf_test.js b/chrome/test/data/indexeddb/perf_test.js
index 6e797f187b59c199519866f3e90b9df8e7965b3f..2eaf456353c4d8518de733395647778fb88477a9 100644
--- a/chrome/test/data/indexeddb/perf_test.js
+++ b/chrome/test/data/indexeddb/perf_test.js
@@ -51,8 +51,8 @@ function testRandomReadsAndWrites(
   var completionFunc;
   function onSetupComplete(db) {
     automation.setStatus("Setup complete.");
-    runOneBatch(db);
     completionFunc = getCompletionFunc(testName, Date.now(), onTestComplete);
+    runOneBatch(db);
   }
 
   function runOneBatch(db) {
@@ -81,12 +81,14 @@ function testRandomReadsAndWrites(
   }
 
   automation.setStatus("Creating database.");
-  var options = {};
+  var options;
   if (useIndexForReads) {
-    options.indexName = indexName;
-    options.indexKeyPath = "";
-    options.indexIsUnique = false;
-    options.indexIsMultiEntry = false;
+    options = [{
+      indexName: indexName,
+      indexKeyPath: "",
+      indexIsUnique: false,
+      indexIsMultiEntry: false,
+    }];
   }
   createDatabase(testName, objectStoreNames, onCreated, onError, options);
 }
@@ -135,21 +137,190 @@ function testCreateAndDeleteIndex(numKeys, onTestComplete) {
   createDatabase(testName, objectStoreNames, onCreated, onError);
 }
 
+function testCursorReadsAndRandomWrites(
+    readKeysOnly, useIndexForReads, writeToAnotherStore, onTestComplete) {
+  // There's no key cursor unless you're reading from an index.
+  assert(useIndexForReads || !readKeysOnly);
+  // If we're writing to another store, having an index would constrain our
+  // writes, as we create both object stores with the same configurations.
+  // We could do that if needed, but it's simpler not to.
+  assert(!useIndexForReads || !writeToAnotherStore);
+  var numKeys = 1000;
+  var numReadsPerTransaction = 100;
+  var testName = getDisplayName(arguments);
+  var objectStoreNames = ["input store"];
+  if (writeToAnotherStore)
+    objectStoreNames.push("output store");
+  var getKeyForRead = getSimpleKey;
+  var indexName;
+  if (useIndexForReads) {
+    indexName = "index";
+    getKeyForRead = function(i) {
+      // This depends on the implementations of getValuesFromCursor and
+      // getObjectValue.  We reverse the order of the iteration here so that
+      // setting up bounds from k to k+n with n>0 works.  Without this reversal,
+      // the upper bound is below the lower bound.
+      return getBackwardIndexKey(numKeys - i);
+    }
+  }
+
+  function onCreated(db) {
+    automation.setStatus("Setting up test database.");
+    var transaction = getTransaction(db, objectStoreNames, "readwrite",
+        function() { onSetupComplete(db); });
+    putLinearValues(transaction, objectStoreNames, numKeys, getSimpleKey,
+        getObjectValue);
+  }
+  function onSetupComplete(db) {
+    automation.setStatus("Setup complete.");
+    var completionFunc =
+        getCompletionFunc(testName, Date.now(), onTestComplete);
+    var mode = "readonly";
+    if (writeToAnotherStore)
+      mode = "readwrite";
+    var transaction =
+        getTransaction(db, objectStoreNames, mode, completionFunc);
+
+    getValuesFromCursor(
+        transaction, objectStoreNames[0], numReadsPerTransaction, numKeys,
+        indexName, getKeyForRead, readKeysOnly, objectStoreNames[1]);
+  }
+
+  automation.setStatus("Creating database.");
+  var options;
+  if (useIndexForReads) {
+    options = [{
+      indexName: indexName,
+      indexKeyPath: "lastName", // depends on getBackwardIndexKey()
+      indexIsUnique: true,
+      indexIsMultiEntry: false,
+    }];
+  }
+  createDatabase(testName, objectStoreNames, onCreated, onError, options);
+}
+
+function testSporadicWrites(
+    numWritesPerTransaction, numIndices, onTestComplete) {
+  var numKeys = 1000;
+  // With 30 transactions, spaced 50ms apart, we'll need at least 1.5s.
+  var numTransactions = 30;
+  var delayBetweenBatches = 50;
+  var indexName;
+  var testName = getDisplayName(arguments);
+  var numTransactionsLeft = numTransactions;
+  var objectStoreNames = ["store"];
+  var numTransactionsRunning = 0;
+
+  var getValue = getSimpleValue;
+  if (numIndices)
+    getValue = function (i) { return getNFieldObjectValue(i, numIndices); };
+
+  function onCreated(db) {
+    automation.setStatus("Setting up test database.");
+    var transaction = getTransaction(db, objectStoreNames, "readwrite",
+        function() { onSetupComplete(db); });
+    putLinearValues(transaction, objectStoreNames, numKeys, getSimpleKey,
+        getValue);
+  }
+  var completionFunc;
+  function onSetupComplete(db) {
+    automation.setStatus("Setup complete.");
+    completionFunc = getCompletionFunc(testName, Date.now(), onTestComplete);
+    runOneBatch(db);
+  }
+
+  function runOneBatch(db) {
+    assert(numTransactionsLeft);
+    if (--numTransactionsLeft) {
+      setTimeout(function () { runOneBatch(db); }, delayBetweenBatches);
+    }
+    ++numTransactionsRunning;
+
+    function batchComplete() {
+      assert(numTransactionsRunning);
+      if (!--numTransactionsRunning && !numTransactionsLeft)
+        completionFunc();
+    }
+
+    var mode = "readonly";
+    if (numWritesPerTransaction)
+      mode = "readwrite";
+
+    var transaction = getTransaction(db, objectStoreNames, mode, batchComplete);
+    putRandomValues(transaction, objectStoreNames, numWritesPerTransaction,
+        numKeys);
+  }
+
+  automation.setStatus("Creating database.");
+  var options = [];
+  for (var i=0; i < numIndices; ++i) {
+    var o = {};
+    o.indexName = "index " + i;
+    o.indexKeyPath = "field" + i; // depends on getNFieldObjectValue

[jsbell, 2012/07/27 00:25:46]

Maybe add function getNFieldName(n) { return "field" + n; } to wrap dependency?

[ericu, 2012/07/31 01:00:53]

Done.

+    o.indexIsUnique = false;
+    o.indexIsMultiEntry = false;
+    options.push(o);
+  }
+  createDatabase(testName, objectStoreNames, onCreated, onError, options);
+}
+
 var kUseIndex = true;
 var kDontUseIndex = false;
+var kReadKeysOnly = true;
+var kReadDataToo = false;
+var kWriteToo = true;
+var kDontWrite = false;
+
 var tests = [
+// Create a single small item in a single object store.
   [testCreateKeysInStores, 1,     1,    1],
+// Create many small items in a single object store.
   [testCreateKeysInStores, 100,   1,    1],
+// Create a single small item in many object stores.
   [testCreateKeysInStores, 1,     100,  1],
+// Create many large items in a single object store.
   [testCreateKeysInStores, 100,   1,    10000],
+// Read a few random items in each of many transactions.
   [testRandomReadsAndWrites, 1000,  5,    0,  50, kDontUseIndex],
+// Read many random items in each of a few transactions.
   [testRandomReadsAndWrites, 1000,  50,   0,  5,  kDontUseIndex],
+// Read many random items in each of a few transactions, in a large store.
   [testRandomReadsAndWrites, 5000,  50,   0,  5,  kDontUseIndex],
+// Read a few random items from an index, in each of many transactions.
   [testRandomReadsAndWrites, 1000,  5,    0,  50, kUseIndex],
+// Read many random items from an index, in each of a few transactions.
   [testRandomReadsAndWrites, 1000,  50,   0,  5,  kUseIndex],
+// Read many random items from an index, in each of a few transactions, in a
+// large store.
   [testRandomReadsAndWrites, 5000,  50,   0,  5,  kUseIndex],
+// Read and write a few random items in each of many transactions.
   [testRandomReadsAndWrites, 1000,  5,    5,  50, kDontUseIndex],
+// Read and write a few random items, reading from an index, in each of many
+// transactions.
   [testRandomReadsAndWrites, 1000,  5,    5,  50, kUseIndex],
+// Read a long, contiguous sequence of an object store via a cursor.
+  [testCursorReadsAndRandomWrites, kReadDataToo, kDontUseIndex, kDontWrite],
+// Read a sequence of an object store via a cursor, writing
+// transformed values into another.
+  [testCursorReadsAndRandomWrites, kReadDataToo, kDontUseIndex, kWriteToo],
+// Read a sequence of an index into an object store via a cursor.
+  [testCursorReadsAndRandomWrites, kReadDataToo, kUseIndex, kDontWrite],
+// Read a sequence of an index into an object store via a key cursor.
+  [testCursorReadsAndRandomWrites, kReadKeysOnly, kUseIndex, kDontWrite],
+// Make batches of random writes into a store, triggered by periodic setTimeout
+// calls.
+  [testSporadicWrites, 5, 0],
+// Make large batches of random writes into a store, triggered by periodic
+// setTimeout calls.
+  [testSporadicWrites, 50, 0],
+// Make batches of random writes into a store with many indices, triggered by
+// periodic setTimeout calls.
+  [testSporadicWrites, 5, 10],
+// Make large batches of random writes into a store with many indices, triggered
+// by periodic setTimeout calls.
+  [testSporadicWrites, 50, 10],
+// Create and delete an index on a store that already contains data [produces
+// a timing result for each of creation and deletion].
   [testCreateAndDeleteIndex, 1000]
 ];