-
Notifications
You must be signed in to change notification settings - Fork 0
/
index.html
executable file
·623 lines (595 loc) · 28.1 KB
/
index.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>reveal.js - The HTML Presentation Framework</title>
<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
<meta name="author" content="Hakim El Hattab">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
<link rel="stylesheet" href="css/reveal.css">
<link rel="stylesheet" href="css/style.css" id="theme">
<!-- Code syntax highlighting -->
<link rel="stylesheet" href="lib/css/zenburn.css">
<!-- Printing and PDF exports -->
<script>
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
</script>
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="theme-font-opensans theme-color-forest-yellow" style="width: 100%; height: 100%;">
<div class="reveal">
<div class="slides">
<section>
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 210px; height: auto;">
<div class="sl-block-content">
<h1>JavaScript Performance Optimizations</h1>
</div>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 900px; left: 30px; top: 58px; height: auto;">
<div class="sl-block-content" style="font-size: 200%; text-align: left;">
<h1>Why
<br/>
When
<br/>
What
</h1>
</div>
</div>
</section>
<section data-background-image="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1620467/why.gif" data-background-size="cover"></section>
<section>
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 190px; height: auto;">
<div class="sl-block-content">
<h1>Why</h1>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 287px; height: auto;">
<div class="sl-block-content">
<h2>To achieve a balance between fast execution speed and small code size</h2>
</div>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 190px; height: auto;">
<div class="sl-block-content">
<h1>When</h1>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 287px; height: auto;">
<div class="sl-block-content">
<h2>After analysis! Don't jump to optimizations and don't over optimize</h2>
</div>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 190px; height: auto;">
<div class="sl-block-content" style="z-index: 10;">
<h1>How</h1>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 287px; height: auto;">
<div class="sl-block-content" style="z-index: 11;">
<h2>Strings, variables, functions...</h2>
</div>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 430px; left: 25px; top: 70px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 11;">
<h2>Strings</h2>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 430px; left: 25px; top: 144px; height: auto;">
<div class="sl-block-content" style="z-index: 12; text-align: left;">
<p>Concat (str+) vs arr.join</p>
</div>
</div>
<div class="sl-block" data-block-type="code" style="min-width: 30px; min-height: 30px; width: 496px; height: 448px; left: 439px; top: 78px;">
<div class="sl-block-content fragment" style="z-index: 14; border-width: 1px;" data-highlight-theme="xcode" data-fragment-index="0">
<pre class="javascript">
<code>//String concatenation
var myConcatString = "this is a string" +
"and I am another string" +
"together we make a bigger string";
//Array join
var myConcatString = ["this is a string",
"and I am another string",
"together we make a bigger string"].join();
</code></pre>
</div>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 49px; top: 130px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 11;">
<h3>Experiment results</h3>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 49px; top: 200px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 12;">
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">Chrome, str+ vs. arr.join:</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">
<strong>745M ops/sec</strong> vs. 21M ops/sec
</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">FF, str+ vs. arr.join:</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">
<strong>1Billion ops/sec</strong> vs. 7M ops/sec
</span>
</p>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 515px; top: 130px; height: auto;">
<div class="sl-block-content fragment" style="text-align: left; z-index: 13;" data-fragment-index="0">
<h3>Explination</h3>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 515px; top: 200px; height: auto;">
<div class="sl-block-content fragment" style="text-align: left; z-index: 14;" data-fragment-index="0">
<p style="color:rgb(255, 255, 255)">
<span>Depends on your browser:</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span>Modern browsers heavily optimize the str+.</span>
</p>
</div>
</div>
<div class="sl-block" data-block-type="image" style="width: 59px; height: 59px; left: 51px; top: 41px;">
<a class="sl-block-content" style="z-index: 15;" href="http://jsperf.com/wj-concat-vs-join" target="_blank">
<img data-natural-width="256" data-natural-height="256" style="" data-src="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1627629/chart-line-icon.png"/>
</a>
</div>
</section>
<section data-background-image="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1620867/tstupid.gif"></section>
<section>
<div class="sl-block" data-block-type="text" style="width: 430px; left: 25px; top: 70px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 11;">
<h2>Variables</h2>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 430px; left: 25px; top: 144px; height: auto;">
<div class="sl-block-content" style="z-index: 12; text-align: left;">
<p>Global vs. local variable defenition</p>
</div>
</div>
<div class="sl-block" data-block-type="code" style="width: 496px; height: 448px; left: 439px; top: 78px;">
<div class="sl-block-content fragment" style="z-index: 14; border-width: 1px;" data-highlight-theme="xcode" data-fragment-index="0">
<pre class="javascript">
<code>//Global / outside reference
var i;
for (i=0; i<1000000; i++);
//Local function variable
function countMeLocal() {
var i;
for (i=0; i<1000000; i++);
}
countMeLocal(); </code></pre>
</div>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 49px; top: 130px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 11;">
<h3>Experiment results</h3>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 49px; top: 200px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 12;">
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">Chrome, global vs local:</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">363 ops/sec vs.
<strong>1,008 ops/sec</strong>
</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">FF, </span>
<span style="color:rgb(255, 255, 255)">global vs local</span>
<span style="font-size:1.0em">:</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">164 ops/sec vs.
<strong>1,572 ops/sec</strong>
</span>
</p>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 515px; top: 130px; height: auto;">
<div class="sl-block-content fragment" style="text-align: left; z-index: 13;" data-fragment-index="0">
<h3>Explination</h3>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 515px; top: 200px; height: auto;">
<div class="sl-block-content fragment" style="text-align: left; z-index: 14;" data-fragment-index="0">
<p style="color:rgb(255, 255, 255)">Scope chain lookup,</p>
<p style="color:rgb(255, 255, 255)">Global scope is a highly populated namespace,</p>
<p style="color:rgb(255, 255, 255)">
<span>Browser must distinguish between global variables and properties of objects that are in the current context. i.e </span>alert()
<span> and </span>window.alert()
</p>
</div>
</div>
<div class="sl-block" data-block-type="image" style="min-width: 30px; min-height: 30px; width: 59px; height: 59px; left: 51px; top: 41px;">
<a class="sl-block-content" style="z-index: 15;" href="http://jsperf.com/wj-local-function-variable2" target="_blank">
<img data-natural-width="256" data-natural-height="256" style="" data-src="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1627629/chart-line-icon.png"/>
</a>
</div>
</section>
<section data-background-image="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1620830/amazed.gif"></section>
<section>
<div class="sl-block" data-block-type="text" style="width: 430px; left: 25px; top: 70px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 10;">
<h2>Functions</h2>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 430px; left: 25px; top: 144px; height: auto;">
<div class="sl-block-content" style="z-index: 11; text-align: left;">
<p>Defining class methods</p>
</div>
</div>
<div class="sl-block" data-block-type="code" style="width: 496px; height: 448px; left: 439px; top: 78px;">
<div class="sl-block-content fragment" style="z-index: 12; border-width: 1px;" data-highlight-theme="xcode" data-fragment-index="0">
<pre class="javascript">
<code>//Define on instantiation
function MyClass() {
// constructor body
this.myFunc = function() {
// do something
};
}
//Define on the prototype
function MyClass() {
// constructor body
}
MyClass.prototype.myFunc = function() {
// do something
};
</code></pre>
</div>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 49px; top: 130px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 10;">
<h3>Experiment results</h3>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 49px; top: 200px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 11;">
<p style="color:rgb(255, 255, 255)">Instance Creation</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">Chrome, instance vs. prototype:</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">5M ops/sec vs.
<strong>70M ops/sec</strong>
</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">FF, instance vs. prototype:</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">52M ops/sec vs.
<strong>518M ops/sec</strong>
</span>
</p>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 515px; top: 130px; height: auto;">
<div class="sl-block-content fragment" style="text-align: left; z-index: 12;" data-fragment-index="0">
<h3>Explination</h3>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 515px; top: 200px; height: auto;">
<div class="sl-block-content fragment" style="text-align: left; z-index: 13;" data-fragment-index="0" dir="ui">
<p style="color:rgb(255, 255, 255)">In the prototype approach, only a single instance of myFunc is created, compared to the second approach where myFunc is created for each instance. </p>
</div>
</div>
<div class="sl-block" data-block-type="image" style="min-width: 30px; min-height: 30px; width: 59px; height: 59px; left: 51px; top: 41px;">
<a class="sl-block-content" style="z-index: 15;" href="ttp://jsperf.com/wj-define-class-method" target="_blank">
<img data-natural-width="256" data-natural-height="256" style="" data-src="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1627629/chart-line-icon.png"/>
</a>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 49px; top: 130px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 10;">
<h3>Experiment results</h3>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 49px; top: 200px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 11;">
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">Function invocation</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">Chrome, instance vs. prototype:</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">
<strong>75M ops/sec</strong> vs. 68M ops/sec
</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">FF, instance vs. prototype:</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">
<strong>1,015 Billion</strong> ops/sec vs.
<strong>
<span style="color:rgb(255, 255, 255)">1,015 Billion</span> ops/sec
</strong>
</span>
</p>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 515px; top: 130px; height: auto;">
<div class="sl-block-content fragment" style="text-align: left; z-index: 12;" data-fragment-index="0">
<h3>Explination</h3>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 515px; top: 200px; height: auto;">
<div class="sl-block-content fragment" style="text-align: left; z-index: 13;" data-fragment-index="0" dir="ui">
<p style="color:rgb(255, 255, 255)">Basically similar results.</p>
<p style="color:rgb(255, 255, 255)">Browsers heavily optimize the prototype chain lookup.</p>
</div>
</div>
<div class="sl-block" data-block-type="image" style="min-width: 30px; min-height: 30px; width: 59px; height: 59px; left: 51px; top: 41px;">
<a class="sl-block-content" style="z-index: 15;" href="http://jsperf.com/wj-invoke-function-on-instance-vs-on-prototype" target="_blank">
<img data-natural-width="256" data-natural-height="256" style="" data-src="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1627629/chart-line-icon.png"/>
</a>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 430px; left: 25px; top: 92px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 10;">
<h2>Functions</h2>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 430px; left: 25px; top: 166px; height: auto;">
<div class="sl-block-content" style="z-index: 11; text-align: left;">
<p>Access Instance variables declaration/initialization with value type </p>
</div>
</div>
<div class="sl-block" data-block-type="code" style="width: 496px; height: 448px; left: 439px; top: 100px;">
<div class="sl-block-content fragment" style="z-index: 12; border-width: 1px;" data-highlight-theme="xcode" data-fragment-index="0">
<pre class="javascript">
<code>//Define on instantiation
function MyClass() {
// constructor body
this.myNumber = 4;
this.myBoolean = true;
this.myString = 'what?!?!?';
this.myArray = [];
}
//Define on the prototype
function MyClass() {
// constructor body
this.myArray = [];
}
MyClass.prototype.myNumber = 4;
MyClass.prototype.myBoolean = true;
MyClass.prototype.myString = 'what?!?!?';</code></pre>
</div>
</div>
<div class="sl-block" data-block-type="image" style="min-width: 30px; min-height: 30px; width: 59px; height: 59px; left: 25px; top: 41px;">
<a class="sl-block-content" style="z-index: 14;" href="http://jsperf.com/wj-access-variable-on-instance-vs-on-prototype" target="_blank">
<img data-natural-width="256" data-natural-height="256" style="" data-src="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1627629/chart-line-icon.png"/>
</a>
</div>
</section>
<section data-background-image="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1620832/same.gif">
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 522px; height: auto;">
<div class="sl-block-content">
<h1>Same Result</h1>
</div>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 430px; left: 25px; top: 70px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 10;">
<h2>Closures</h2>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 430px; left: 25px; top: 144px; height: auto;">
<div class="sl-block-content" style="z-index: 11; text-align: left;">
<p>Invoke a function with closure vs. An inner function with no closure vs. a static reference to a function.</p>
</div>
</div>
<div class="sl-block" data-block-type="code" style="width: 455px; height: 538px; left: 480px; top: 78px;">
<div class="sl-block-content fragment" style="z-index: 13; border-width: 1px;" data-highlight-theme="xcode" data-fragment-index="0">
<pre class="javascript">
<code>//Closure (referencing msg)
function tellTheWorld() {
var msg = 'I am Iron Man';
setTimeout(function() {
alert(msg);
}, 100);
}
//Inner function - no closure
function tellTheWorld() {
setTimeout(function() {
var msg = 'I am Iron Man';
alert(msg);
}, 100);
}
//Reuse a static function
function theMessage() {
var msg = 'I am Iron Man';
alert(msg);
}
function tellTheWorld() {
setTimeout(theMessage, 100);
}</code></pre>
</div>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 42px; top: 90px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 10;">
<h3>Experiment results</h3>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 42px; top: 160px; height: auto;">
<div class="sl-block-content" style="text-align: left; z-index: 11;">
<h3 style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">Closure</span>
</h3>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">Chrome 295K ops/sec </span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">FF 69K ops/sec</span>
</p>
<h3 style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">Inner function</span>
</h3>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">Chrome 297K ops/sec </span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">FF 70K ops/sec</span>
</p>
<h3 style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">Static function</span>
</h3>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:0.9em">
<strong>Chrome 328K ops/sec</strong>
</span>
</p>
<p style="color:rgb(255, 255, 255)">
<strong>
<span style="font-size:0.9em">FF 73K ops/sec</span>
</strong>
</p>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 508px; top: 90px; height: auto;">
<div class="sl-block-content fragment" style="text-align: left; z-index: 12;" data-fragment-index="0">
<h3>Explination</h3>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 410px; left: 508px; top: 160px; height: auto;">
<div class="sl-block-content fragment" style="text-align: left; z-index: 13;" dir="ui" data-fragment-index="1">
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">Closure is slowest - adds another level to the scope (scope chain lookup is slower)</span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">Inner function is slower - recreating the function </span>
</p>
<p style="color:rgb(255, 255, 255)">
<span style="font-size:1.0em">Static function is fastest - referencing the same function</span>
</p>
</div>
</div>
<div class="sl-block" data-block-type="image" style="min-width: 30px; min-height: 30px; width: 59px; height: 59px; left: 51px; top: 41px;">
<a class="sl-block-content" style="z-index: 15;" href="http://jsperf.com/wj-closure-vs-inner-func-vs-static-func" target="_blank">
<img data-natural-width="256" data-natural-height="256" style="" data-src="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1627629/chart-line-icon.png"/>
</a>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 190px; height: auto;">
<div class="sl-block-content" style="z-index: 10;">
<h1>Beware of</h1>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 287px; height: auto;">
<div class="sl-block-content" style="z-index: 11;">
<h2>eval, setTimeout, try-catch, a with statement</h2>
</div>
</div>
<div class="sl-block" data-block-type="image" style="min-width: 30px; min-height: 30px; width: 59px; height: 59px; left: 51px; top: 41px;">
<a class="sl-block-content" style="z-index: 13;" href="http://jsperf.com/ws-closure-vs-inner-vs-static-no-lookup" target="_blank">
<img data-natural-width="256" data-natural-height="256" style="" data-src="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1627629/chart-line-icon.png"/>
</a>
</div>
</section>
<section data-background-image="https://s3.amazonaws.com/media-p.slid.es/uploads/360518/images/1620866/rocko.gif">
<div class="sl-block" data-block-type="text" style="height: auto; min-width: 30px; min-height: 30px; width: 452px; left: 225px; top: 0px;">
<div class="sl-block-content" style="z-index: 11;">
<h1>Thank You</h1>
</div>
</div>
</section>
<section>
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 118px; height: auto;">
<div class="sl-block-content">
<h2>JS Pref Links</h2>
</div>
</div>
<div class="sl-block" data-block-type="text" style="width: 800px; left: 80px; top: 218px; height: auto;">
<div class="sl-block-content">
<p style="text-align:left">
<span style="font-size:0.7em">http://jsperf.com/wj-concat-vs-join</span>
</p>
<p style="text-align:left">
<span style="font-size:0.7em">http://jsperf.com/wj-define-class-method</span>
</p>
<p style="text-align:left">
<span style="font-size:0.7em">http://jsperf.com/wj-invoke-function-on-instance-vs-on-prototype</span>
</p>
<p style="text-align:left">
<span style="font-size:0.7em">http://jsperf.com/wj-access-variable-on-instance-vs-on-prototype</span>
</p>
<p style="text-align:left">
<span style="font-size:0.7em">http://jsperf.com/wj-closure-vs-inner-func-vs-static-func</span>
</p>
<p style="text-align:left">
<span style="font-size:0.7em">http://jsperf.com/ws-closure-vs-inner-vs-static-no-lookup</span>
</p>
<p style="text-align:left">
<span style="font-size:0.7em">http://jsperf.com/wj-local-function-variable</span>
</p>
<p style="text-align:left">
<span style="font-size:0.7em">http://jsperf.com/wj-local-function-variable2</span>
</p>
</div>
</div>
</section>
</div>
</div>
</div>
<script src="lib/js/head.min.js"></script>
<script src="js/reveal.js"></script>
<script>
// Full list of configuration options available at:
// https://github.com/hakimel/reveal.js#configuration
Reveal.initialize({
controls: true,
progress: true,
history: true,
center: false,
transition: 'slide', // none/fade/slide/convex/concave/zoom
// Optional reveal.js plugins
dependencies: [
{ src: 'lib/js/classList.js', condition: function() { return !document.body.classList; } },
{ src: 'plugin/markdown/marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
{ src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
{ src: 'plugin/highlight/highlight.js', async: true, condition: function() { return !!document.querySelector( 'pre code' ); }, callback: function() { hljs.initHighlightingOnLoad(); } },
{ src: 'plugin/zoom-js/zoom.js', async: true },
{ src: 'plugin/notes/notes.js', async: true }
]
});
</script>
</body>
</html>