Download Even Faster Web Sites: Performance Best Practices for Web by Steve Souders PDF

By Steve Souders

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Performance is important to the luck of any site. during this ebook, Steve Souders, net functionality evangelist at Google and previous leader functionality Yahoo!, presents worthwhile concepts that will help you optimize your site's functionality. Souders and 8 professional individuals supply top practices and pragmatic suggestion for bettering your site's functionality in 3 serious different types: JavaScript, within the community, and within the browser.

This publication includes six visitor chapters contributed via Dion Almaer, Doug Crockford, Ben Galbraith, Tony Gentilcore, Dylan Schiemann, Stoyan Stefanov, Nicole Sullivan, and Nicholas C. Zakas.

Performance is important to the good fortune of any website, and but today's internet purposes push browsers to their limits with expanding quantities of wealthy content material and heavy use of Ajax. during this publication, Steve Souders, internet functionality evangelist at Google and previous leader functionality Yahoo!, presents invaluable ideas that can assist you optimize your site's performance.

Souders' prior e-book, the bestselling excessive functionality sites, stunned the net improvement global via revealing that eighty% of the time it takes for an online web page to load is at the buyer aspect. In Even swifter websites, Souders and 8 specialist participants offer most sensible practices and pragmatic recommendation for bettering your site's functionality in 3 severe categories:

JavaScript-Get suggestion for knowing Ajax functionality, writing effective JavaScript, developing responsive functions, loading scripts with out blockading different elements, and more.
Network-Learn to proportion assets throughout a number of domain names, decrease picture dimension with out lack of caliber, and use chunked encoding to render pages faster.
Browser-Discover possible choices to iframes, the way to simplify CSS selectors, and different techniques.

Speed is vital for today's wealthy media sites and net 2.0 functions. With this booklet, you'll find out how to shave worthwhile seconds off your sites' load instances and cause them to reply even faster.

This e-book comprises six visitor chapters contributed by means of Dion Almaer, Doug Crockford, Ben Galbraith, Tony Gentilcore, Dylan Schiemann, Stoyan Stefanov, Nicole Sullivan, and Nicholas C. Zakas.

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40 6 Ein schematisches C-Programm Ein Prototyp auch für main ist durchaus nicht unsinnig, denn main darf auch im sichtbaren C-Quellkode (rekursiv) aufgerufen werden – also nicht nur vom hinzugelinkten Startkode aus. h> sind nicht zwingend notwendig. Falls man aber Bibliotheks-Funktionen (Library) verwenden will, müssen zugehörige Header angegeben werden, da darin die notwendigen Deklarationen und Prototypen angegeben sind. Header-Dateien sollen nur Deklarationen enthalten! Werden darin Objekte angelegt, bekommt man recht schnell konzeptionelle Probleme.

36 löscht redundante Trennzeichen in Pfadnamen #if defined(DOS32) || defined(DOS) # define PNT ’\\’ #else # define PNT ’/’ #endif PNT = PfadNamenTrennzeichen 36 5 Der C-Preprocessor #if defined(F_ultoa_F) #if defined(SLOW_FUNCTIONS) int ultoa_F(byte *puf, ulong u) { byte buf[(sizeof(u)*CHAR_BIT)/3+2]; register byte *bp= buf; do *bp++= (byte)(u%10U + ’0’); while ( u/=10U ); { register int l=0; while (bp>buf) puf[l++]= *--bp; puf[l]= 0; return l; } } #else int ultoa_F(byte *a, ulong u) { if (u>0xFFFFul) return ( ultoa_H(a, u) - a ); return ( utoa_H(a, (unsigned)u) - a ); } #endif #endif 184, 30, 29, 74.

849999999999981 oder oder oder oder ... 850000000000000. Dabei darf nicht vorschnell einer Ausgabe durch die Funktion printf() vertraut werden, denn die rundet per Voreinstellung bei der Umwandlung des GleitkommaWertes in eine lesbare Zeichenkette. Folglich mit einem Epsilon-Wert arbeiten: (v >= f-eps && v <= f+eps) 22 3 Punktuatoren und Operatoren & ^ | Bitweise: UND(AND)-, XODER(XOR)-, ODER(OR)-Verknüpfung. i = 32; i |= (1 | 4 | 8); i &= ~(1 | 4 | 8); 10000001 ^ 11111111 == if ( i & (4|8)) ...

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