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In Swedish, 30 min talk on optimizing javascript.
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Optimera JS
1.
Jacob Hansson Optimerad
Javascript
2.
3.
4.
Optimerad Javascript
5.
vs Faktisk hastighet
uppfattad hastighet
6.
och nätverkstid körtid
7.
1. 2.
3. 4. Trimma nätverkstid Trimma körtid Automatisera (10 min) (10 min) (5 min) Mäta hastighet (5 min)
8.
1. Mäta
hastighet
9.
1. Mäta
hastighet Firebug
10.
1. Mäta
hastighet Firebug
11.
1. Mäta
hastighet Speed Tracer
12.
1. 2.
3. 4. Trimma nätverkstid Trimma körtid Automatisera (10 min) (10 min) (5 min) Mäta hastighet (5 min)
13.
2. Trimma
nätverkstid Minska datamängden Färre requests Hämta i bakgrunden
14.
2. Trimma
nätverkstid function add (first, second) { var localVar = 12; return first + second; }
15.
2. Trimma
nätverkstid function add (first, second) { var localVar = 12; return first + second; } function add (a,b){ return a+b;} minification:
16.
2. Trimma
nätverkstid function add (first, second) { var localVar = 12; return eval (first); }
17.
2. Trimma
nätverkstid function add (first, second) { var localVar = 12; return eval (first); } function add (first,second){ var lo calVar=12; return eval (first);} minification:
18.
2. Trimma
nätverkstid function add (first,second){ var lo calVar=12; return eval (first);} function add (a,b){ return a+b;}
19.
2. Trimma
nätverkstid Samla AJAX-anrop
20.
2. Trimma
nätverkstid Code-splitting
21.
2. Trimma
nätverkstid load ( “my.code” ,function() { my.code. foo (); });
22.
1. 2.
3. 4. Trimma nätverkstid Trimma körtid Automatisera (10 min) (10 min) (5 min) Mäta hastighet (5 min)
23.
3. Trimma
körtid UI-tråden Snabbare DOM
24.
3. Trimma
körtid 50 ms
25.
3. Trimma
körtid JS -> DOM
26.
3. Trimma
körtid JS -> DOM
27.
3. Trimma
körtid var ul = $ ( "<ul></ul>" ); $ ( "#mydiv" ). append (ul); while ( count-- ) { ul. append ( "<li></li>" ); }
28.
3. Trimma
körtid var ul = $ ( "<ul></ul>" ); while ( count-- ) { ul. append ( "<li></li>" ); } $ ( "#mydiv" ). append (ul);
29.
1. 2.
3. 4. Trimma nätverkstid Trimma körtid Automatisera (10 min) (10 min) (5 min) Mäta hastighet (5 min)
30.
4. Automatisera
Build-tools
31.
4. Automatisera
QUnit och JSLitmus
32.
4. Automatisera
Testa i alla webbläsare
33.
@jakewins [email_address]
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