¿Cómo funciona Google Instant?

¿Alguna idea sobre cómo funciona exactamente la nueva búsqueda instantánea de Google? Parece que solo se trata de llamadas AJAX a la búsqueda anterior, pero es bastante difícil simplificar tanto Google. Alguien tiene especulaciones?

EDITAR: Sé que se envía AJAX con cada pulsación de tecla, pero ¿es predictivo? ¿O crees que es solo una búsqueda habitual en Google?

ACTUALIZACIÓN: Google acaba de publicar un artículo de blog llamado Google Instant, detrás de escena . Es una lectura interesante, y obviamente relacionada con esta pregunta. Puede leer cómo abordaron la carga adicional (5-7X según el artículo) en el lado del servidor, por ejemplo. La respuesta a continuación examina lo que sucede en el lado del cliente:

Examinando con Firebug , Google está haciendo una solicitud Ajax GET en cada pulsación de tecla:

Supongo que funciona de la misma manera que la finalización automática. Sin embargo, esta vez, también devuelve los resultados de búsqueda de la frase de búsqueda parcialmente completa en formato JSON .

Examinando una de las respuestas JSON mientras escribe "Desbordamiento de pila":

Podemos ver que la respuesta JSON contiene el contenido para construir los resultados de búsqueda a medida que escribimos.

Las respuestas JSON formateadas se parecen a esto:

{
    e: "j9iHTLXlLNmXOJLQ3cMO",
    c: 1,
    u: "http://www.google.com/search?hl\x3den\x26expIds\x3d17259,24472,24923,25260,25901,25907,26095,26446,26530\x26sugexp\x3dldymls\x26xhr\x3dt\x26q\x3dStack%20Overflow\x26cp\x3d6\x26pf\x3dp\x26sclient\x3dpsy\x26aq\x3df\x26aqi\x3dg4g-o1\x26aql\x3d\x26oq\x3dStack+\x26gs_rfai\x3d\x26pbx\x3d1\x26fp\x3df97fdf10596ae095\x26tch\x3d1\x26ech\x3d1\x26psi\x3dj9iHTO3xBo2CONvDzaEO12839712156911",
    d: "\x3clink rel\x3dprefetch href\x3d\x22http://stackoverflow.com/\x22\x3e\x3cscript\x3eje.pa(_loc, \x27rso\x27, \x27\\x3c!--m--\\x3e\\x3clink rel\\x3dprefetch href\\x3d\\x22http://stackoverflow.com/\\x22\\x3e\\x3cli class\\x3dg\\x3e\\x3ch3 class\\x3d\\x22r\\x22\\x3e\\x3ca href\\x3d\\x22http://stackoverflow.com/\\x22 class\\x3dl onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x271\\x27,\\x27AFQjCNERidL9Hb6OvGW93_Y6MRj3aTdMVA\\x27,\\x27\\x27,\\x270CBYQFjAA\\x27)\\x22\\x3e\\x3cem\\x3eStack Overflow\\x3c/em\\x3e\\x3c/a\\x3e\\x3c/h3\\x3e\\x3cdiv class\\x3d\\x22s\\x22\\x3eA language-independent collaboratively edited question and answer site for programmers.\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3e\\x3cb\\x3estackoverflow\\x3c/b\\x3e.com/\\x3c/cite\\x3e - \\x3cspan class\\x3dgl\\x3e\\x3ca href\\x3d\\x22http://webcache.googleusercontent.com/search?q\\x3dcache:U1GC2GYOToIJ:stackoverflow.com/+Stack+Overflow\\x26amp;cd\\x3d1\\x26amp;hl\\x3den\\x26amp;ct\\x3dclnk\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x271\\x27,\\x27AFQjCNFfKMag7Tq8CMbbfu8Gcj_GjukTbA\\x27,\\x27\\x27,\\x270CBgQIDAA\\x27)\\x22\\x3eCached\\x3c/a\\x3e - \\x3ca href\\x3d\\x22/search?hl\\x3den\\x26amp;q\\x3drelated:stackoverflow.com/+Stack+Overflow\\x26amp;tbo\\x3d1\\x26amp;sa\\x3dX\\x26amp;ei\\x3dj9iHTLXlLNmXOJLQ3cMO\\x26amp;sqi\\x3d2\\x26amp;ved\\x3d0CBkQHzAA\\x22\\x3eSimilar\\x3c/a\\x3e\\x3c/span\\x3e\\x3c/span\\x3e\\x3cbr\\x3e\\x3ctable class\\x3dslk style\\x3d\\x22border-collapse:collapse;margin-top:4px\\x22\\x3e\\x3ctr\\x3e\\x3ctd style\\x3d\\x22padding-left:14px;vertical-align:top\\x22\\x3e\\x3cdiv class\\x3dsld\\x3e\\x3ca class\\x3dsla href\\x3d\\x22http://stackoverflow.com/questions\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x271\\x27,\\x27AFQjCNHmP78gEctJKvBrydP2c52F_FEjvA\\x27,\\x27\\x27,\\x270CBoQqwMoADAA\\x27)\\x22\\x3eQuestions\\x3c/a\\x3e\\x3c/div\\x3e\\x3cdiv class\\x3dsld\\x3e\\x3ca class\\x3dsla href\\x3d\\x22http://stackoverflow.com/questions/ask\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x271\\x27,\\x27AFQjCNGZF-qwWVTZOWPlr4vgSA7qB64LLQ\\x27,\\x27\\x27,\\x270CBsQqwMoATAA\\x27)\\x22\\x3eAsk Question\\x3c/a\\x3e\\x3c/div\\x3e\\x3cdiv class\\x3dsld\\x3e\\x3ca class\\x3dsla href\\x3d\\x22http://stackoverflow.com/users/135152/omg-ponies\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x271\\x27,\\x27AFQjCNE9zo6Qi_AM1bjmPGeMGfbnPi3niA\\x27,\\x27\\x27,\\x270CBwQqwMoAjAA\\x27)\\x22\\x3eOMG Ponies\\x3c/a\\x3e\\x3c/div\\x3e\\x3cdiv class\\x3dsld\\x3e\\x3ca class\\x3dsla href\\x3d\\x22http://careers.stackoverflow.com/\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x271\\x27,\\x27AFQjCNEaqlBrfDcc1gdPZ6dgthff0s5WmA\\x27,\\x27\\x27,\\x270CB0QqwMoAzAA\\x27)\\x22\\x3eCareers\\x3c/a\\x3e\\x3c/div\\x3e\\x3ctd style\\x3d\\x22padding-left:14px;vertical-align:top\\x22\\x3e\\x3cdiv class\\x3dsld\\x3e\\x3ca class\\x3dsla href\\x3d\\x22http://stackoverflow.com/about\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x271\\x27,\\x27AFQjCNEqgPttrXj3r4o3TZHX5WaWvFe1HQ\\x27,\\x27\\x27,\\x270CB4QqwMoBDAA\\x27)\\x22\\x3eAbout\\x3c/a\\x3e\\x3c/div\\x3e\\x3cdiv class\\x3dsld\\x3e\\x3ca class\\x3dsla href\\x3d\\x22http://stackoverflow.com/faq\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x271\\x27,\\x27AFQjCNF3X3eRc0RsxYynXZhhbyYkuKWZ5g\\x27,\\x27\\x27,\\x270CB8QqwMoBTAA\\x27)\\x22\\x3eThe FAQ\\x3c/a\\x3e\\x3c/div\\x3e\\x3cdiv class\\x3dsld\\x3e\\x3ca class\\x3dsla href\\x3d\\x22http://blog.stackoverflow.com/\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x271\\x27,\\x27AFQjCNG7KphjK6RuC5cj-6U5jeuvipt5dg\\x27,\\x27\\x27,\\x270CCAQqwMoBjAA\\x27)\\x22\\x3eBlog\\x3c/a\\x3e\\x3c/div\\x3e\\x3cdiv class\\x3dsld\\x3e\\x3ca class\\x3dsla href\\x3d\\x22http://stackoverflow.com/users\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x271\\x27,\\x27AFQjCNFfN_wcGm4HE5XpDxvcH4bIrkv2dw\\x27,\\x27\\x27,\\x270CCEQqwMoBzAA\\x27)\\x22\\x3eUsers\\x3c/a\\x3e\\x3c/div\\x3e\\x3ctr\\x3e\\x3ctd colspan\\x3d2 style\\x3d\\x22padding-left:14px;vertical-align:top\\x22\\x3e\\x3cdiv style\\x3d\\x22padding-top:6px\\x22\\x3e\\x3ca class\\x3dfl href\\x3d\\x22/search?hl\\x3den\\x26amp;q\\x3d+site:stackoverflow.com+Stack+Overflow\\x26amp;sa\\x3dX\\x26amp;ei\\x3dj9iHTLXlLNmXOJLQ3cMO\\x26amp;sqi\\x3d2\\x26amp;ved\\x3d0CCIQrAM\\x22\\x3eMore results from stackoverflow.com\\x26nbsp;\\x26raquo;\\x3c/a\\x3e\\x3c/div\\x3e\\x3c/table\\x3e\\x3c/div\\x3e\\x3c!--n--\\x3e\\x3c!--m--\\x3e\\x3cli class\\x3dg\\x3e\\x3ch3 class\\x3d\\x22r\\x22\\x3e\\x3ca href\\x3d\\x22http://stackoverflow.com/questions\\x22 class\\x3dl onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x272\\x27,\\x27AFQjCNHmP78gEctJKvBrydP2c52F_FEjvA\\x27,\\x27\\x27,\\x270CCUQFjAB\\x27)\\x22\\x3eHottest Questions - \\x3cem\\x3eStack Overflow\\x3c/em\\x3e\\x3c/a\\x3e\\x3c/h3\\x3e\\x3cdiv class\\x3d\\x22s\\x22\\x3eHello \\x3cem\\x3eStack Overflow\\x3c/em\\x3e! I\\x26#39;m working with someone else\\x26#39;s PHP function that works fine as long as I pass it at least three arguments. If I pass it two argument, \\x3cb\\x3e...\\x3c/b\\x3e\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3e\\x3cb\\x3estackoverflow\\x3c/b\\x3e.com/questions\\x3c/cite\\x3e - \\x3cspan class\\x3dgl\\x3e\\x3ca href\\x3d\\x22http://webcache.googleusercontent.com/search?q\\x3dcache:6S_0sErDKfQJ:stackoverflow.com/questions+Stack+Overflow\\x26amp;cd\\x3d2\\x26amp;hl\\x3den\\x26amp;ct\\x3dclnk\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x272\\x27,\\x27AFQjCNH7WHzefYlnS05ln4j6rzfE3byDKg\\x27,\\x27\\x27,\\x270CCcQIDAB\\x27)\\x22\\x3eCached\\x3c/a\\x3e - \\x3ca href\\x3d\\x22/search?hl\\x3den\\x26amp;q\\x3drelated:stackoverflow.com/questions+Stack+Overflow\\x26amp;tbo\\x3d1\\x26amp;sa\\x3dX\\x26amp;ei\\x3dj9iHTLXlLNmXOJLQ3cMO\\x26amp;sqi\\x3d2\\x26amp;ved\\x3d0CCgQHzAB\\x22\\x3eSimilar\\x3c/a\\x3e\\x3c/span\\x3e\\x3c/span\\x3e\\x3c/div\\x3e\\x3c!--n--\\x3e\\x3c!--m--\\x3e\\x3cli class\\x3dg\\x3e\\x3ch3 class\\x3d\\x22r\\x22\\x3e\\x3ca href\\x3d\\x22http://en.wikipedia.org/wiki/Stack_overflow\\x22 class\\x3dl onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x273\\x27,\\x27AFQjCNEAxaeWmWtD7cBcmZ5QBMsTRNbnCw\\x27,\\x27\\x27,\\x270CCkQFjAC\\x27)\\x22\\x3e\\x3cem\\x3eStack overflow\\x3c/em\\x3e - Wikipedia, the free encyclopedia\\x3c/a\\x3e\\x3c/h3\\x3e\\x3cdiv class\\x3d\\x22s\\x22\\x3eIn software, a \\x3cem\\x3estack overflow\\x3c/em\\x3e occurs when too much memory is used on the call stack. The call stack contains a limited amount of memory,  often determined at \\x3cb\\x3e...\\x3c/b\\x3e\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3een.wikipedia.org/wiki/\\x3cb\\x3eStack\\x3c/b\\x3e_\\x3cb\\x3eoverflow\\x3c/b\\x3e\\x3c/cite\\x3e - \\x3cspan class\\x3dgl\\x3e\\x3ca href\\x3d\\x22http://webcache.googleusercontent.com/search?q\\x3dcache:mWu8b0BQAmwJ:en.wikipedia.org/wiki/Stack_overflow+Stack+Overflow\\x26amp;cd\\x3d3\\x26amp;hl\\x3den\\x26amp;ct\\x3dclnk\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x273\\x27,\\x27AFQjCNFG_5ndK-KmWJy6s3pOsi8lsxqEZg\\x27,\\x27\\x27,\\x270CCsQIDAC\\x27)\\x22\\x3eCached\\x3c/a\\x3e - \\x3ca href\\x3d\\x22/search?hl\\x3den\\x26amp;q\\x3drelated:en.wikipedia.org/wiki/Stack_overflow+Stack+Overflow\\x26amp;tbo\\x3d1\\x26amp;sa\\x3dX\\x26amp;ei\\x3dj9iHTLXlLNmXOJLQ3cMO\\x26amp;sqi\\x3d2\\x26amp;ved\\x3d0CCwQHzAC\\x22\\x3eSimilar\\x3c/a\\x3e\\x3c/span\\x3e\\x3c/span\\x3e\\x3c/div\\x3e\\x3c!--n--\\x3e\\x3c!--m--\\x3e\\x3cli class\\x3dg\\x3e\\x3ch3 class\\x3d\\x22r\\x22\\x3e\\x3ca href\\x3d\\x22http://blog.stackoverflow.com/\\x22 class\\x3dl onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x274\\x27,\\x27AFQjCNG7KphjK6RuC5cj-6U5jeuvipt5dg\\x27,\\x27\\x27,\\x270CC0QFjAD\\x27)\\x22\\x3eBlog – \\x3cem\\x3eStack Overflow\\x3c/em\\x3e\\x3c/a\\x3e\\x3c/h3\\x3e\\x3cdiv class\\x3d\\x22s\\x22\\x3e6 Sep 2010 \\x3cb\\x3e...\\x3c/b\\x3e The latest version of the \\x3cem\\x3eStack Overflow\\x3c/em\\x3e Trilogy Creative Commons Data Dump is now available. This reflects all public  data in … \\x3cb\\x3e...\\x3c/b\\x3e\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3eblog.\\x3cb\\x3estackoverflow\\x3c/b\\x3e.com/\\x3c/cite\\x3e - \\x3cspan class\\x3dgl\\x3e\\x3ca href\\x3d\\x22http://webcache.googleusercontent.com/search?q\\x3dcache:iqtvg9Ge1c0J:blog.stackoverflow.com/+Stack+Overflow\\x26amp;cd\\x3d4\\x26amp;hl\\x3den\\x26amp;ct\\x3dclnk\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x274\\x27,\\x27AFQjCNFX2P2-RTCs_GaR6NgSw30p007UEA\\x27,\\x27\\x27,\\x270CC8QIDAD\\x27)\\x22\\x3eCached\\x3c/a\\x3e - \\x3ca href\\x3d\\x22/search?hl\\x3den\\x26amp;q\\x3drelated:blog.stackoverflow.com/+Stack+Overflow\\x26amp;tbo\\x3d1\\x26amp;sa\\x3dX\\x26amp;ei\\x3dj9iHTLXlLNmXOJLQ3cMO\\x26amp;sqi\\x3d2\\x26amp;ved\\x3d0CDAQHzAD\\x22\\x3eSimilar\\x3c/a\\x3e\\x3c/span\\x3e\\x3c/span\\x3e\\x3c/div\\x3e\\x3c!--n--\\x3e\x27,_ss);\x3c/script\x3e"
}/*""*/{
    e: "j9iHTLXlLNmXOJLQ3cMO",
    c: 1,
    u: "http://www.google.com/search?hl\x3den\x26expIds\x3d17259,24472,24923,25260,25901,25907,26095,26446,26530\x26sugexp\x3dldymls\x26xhr\x3dt\x26q\x3dStack%20Overflow\x26cp\x3d6\x26pf\x3dp\x26sclient\x3dpsy\x26aq\x3df\x26aqi\x3dg4g-o1\x26aql\x3d\x26oq\x3dStack+\x26gs_rfai\x3d\x26pbx\x3d1\x26fp\x3df97fdf10596ae095\x26tch\x3d1\x26ech\x3d1\x26psi\x3dj9iHTO3xBo2CONvDzaEO12839712156911",
    d: "\x3cscript\x3eje.pa(_loc, \x27rso\x27, \x27\\x3c!--m--\\x3e\\x3cli class\\x3dg style\\x3d\\x22margin-left:16px\\x22\\x3e\\x3ch3 class\\x3d\\x22r hcw\\x22\\x3e\\x3ca href\\x3d\\x22http://blog.stackoverflow.com/category/podcasts/\\x22 class\\x3dl onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x275\\x27,\\x27AFQjCNGnAJSxUa4GLcg-E7PNvIFmPC53gQ\\x27,\\x27\\x27,\\x270CDEQFjAE\\x27)\\x22\\x3epodcasts - Blog – \\x3cem\\x3eStack Overflow\\x3c/em\\x3e\\x3c/a\\x3e\\x3c/h3\\x3e\\x3cdiv class\\x3d\\x22s hc\\x22\\x3eJoel and Jeff sit down with our new community coordinator, Robert Cartaino, to record a “bonus” podcast discussing the future of \\x3cem\\x3eStack Overflow\\x3c/em\\x3e and Stack \\x3cb\\x3e...\\x3c/b\\x3e\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3eblog.\\x3cb\\x3estackoverflow\\x3c/b\\x3e.com/category/podcasts/\\x3c/cite\\x3e - \\x3cspan class\\x3dgl\\x3e\\x3ca href\\x3d\\x22http://webcache.googleusercontent.com/search?q\\x3dcache:JT0sWmmtiAEJ:blog.stackoverflow.com/category/podcasts/+Stack+Overflow\\x26amp;cd\\x3d5\\x26amp;hl\\x3den\\x26amp;ct\\x3dclnk\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x275\\x27,\\x27AFQjCNErCiLBch55HA8i5BAdChcmQYH8nw\\x27,\\x27\\x27,\\x270CDMQIDAE\\x27)\\x22\\x3eCached\\x3c/a\\x3e - \\x3ca href\\x3d\\x22/search?hl\\x3den\\x26amp;q\\x3drelated:blog.stackoverflow.com/category/podcasts/+Stack+Overflow\\x26amp;tbo\\x3d1\\x26amp;sa\\x3dX\\x26amp;ei\\x3dj9iHTLXlLNmXOJLQ3cMO\\x26amp;sqi\\x3d2\\x26amp;ved\\x3d0CDQQHzAE\\x22\\x3eSimilar\\x3c/a\\x3e\\x3c/span\\x3e\\x3c/span\\x3e\\x3c/div\\x3e\\x3c!--n--\\x3e\\x3c!--m--\\x3e\\x3cli class\\x3dg\\x3e\\x3ch3 class\\x3d\\x22r\\x22\\x3e\\x3ca href\\x3d\\x22http://itc.conversationsnetwork.org/series/stackoverflow.html\\x22 class\\x3dl onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x276\\x27,\\x27AFQjCNHG9l1PMbilYkhohNFuj3g6ce1LuA\\x27,\\x27\\x27,\\x270CDUQFjAF\\x27)\\x22\\x3e\\x3cem\\x3eStackOverflow\\x3c/em\\x3e\\x3c/a\\x3e\\x3c/h3\\x3e\\x3cdiv class\\x3d\\x22s\\x22\\x3eJoel and Jeff sit down with our new community coordinator, Robert Cartaino, to discuss the future of \\x3cem\\x3eStack Overflow\\x3c/em\\x3e and Stack Exchange 2.0. \\x3cb\\x3e...\\x3c/b\\x3e\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3eitc.conversationsnetwork.org/series/\\x3cb\\x3estackoverflow\\x3c/b\\x3e.html\\x3c/cite\\x3e - \\x3cspan class\\x3dgl\\x3e\\x3ca href\\x3d\\x22http://webcache.googleusercontent.com/search?q\\x3dcache:8MkFpx7D4wYJ:itc.conversationsnetwork.org/series/stackoverflow.html+Stack+Overflow\\x26amp;cd\\x3d6\\x26amp;hl\\x3den\\x26amp;ct\\x3dclnk\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x276\\x27,\\x27AFQjCNFP62Bg_o2kaz3jzXxzsrTs_7RdNA\\x27,\\x27\\x27,\\x270CDcQIDAF\\x27)\\x22\\x3eCached\\x3c/a\\x3e - \\x3ca href\\x3d\\x22/search?hl\\x3den\\x26amp;q\\x3drelated:itc.conversationsnetwork.org/series/stackoverflow.html+Stack+Overflow\\x26amp;tbo\\x3d1\\x26amp;sa\\x3dX\\x26amp;ei\\x3dj9iHTLXlLNmXOJLQ3cMO\\x26amp;sqi\\x3d2\\x26amp;ved\\x3d0CDgQHzAF\\x22\\x3eSimilar\\x3c/a\\x3e\\x3c/span\\x3e\\x3c/span\\x3e\\x3c/div\\x3e\\x3c!--n--\\x3e\\x3c!--m--\\x3e\\x3cli class\\x3dg\\x3e\\x3ch3 class\\x3d\\x22r\\x22\\x3e\\x3ca href\\x3d\\x22http://support.microsoft.com/kb/145799\\x22 class\\x3dl onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x277\\x27,\\x27AFQjCNHzyj5rHEX7IiyFWnP0ziE3B32rGg\\x27,\\x27\\x27,\\x270CDkQFjAG\\x27)\\x22\\x3eHow to Troubleshoot Windows Internal \\x3cem\\x3eStack Overflow\\x3c/em\\x3e Error Messages\\x3c/a\\x3e\\x3c/h3\\x3e\\x3cdiv class\\x3d\\x22s\\x22\\x3eThis article lists steps to help you troubleshoot problems with \\x3cem\\x3estack overflow\\x3c/em\\x3e errors in  Windows. Stacks are reserved memory that programs use to process \\x3cb\\x3e...\\x3c/b\\x3e\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3esupport.microsoft.com/kb/145799\\x3c/cite\\x3e - \\x3cspan class\\x3dgl\\x3e\\x3ca href\\x3d\\x22http://webcache.googleusercontent.com/search?q\\x3dcache:ECO9ORCsraAJ:support.microsoft.com/kb/145799+Stack+Overflow\\x26amp;cd\\x3d7\\x26amp;hl\\x3den\\x26amp;ct\\x3dclnk\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x277\\x27,\\x27AFQjCNHYsox9EW1Ye9Nn2G6WQzEpJDOzcw\\x27,\\x27\\x27,\\x270CDsQIDAG\\x27)\\x22\\x3eCached\\x3c/a\\x3e - \\x3ca href\\x3d\\x22/search?hl\\x3den\\x26amp;q\\x3drelated:support.microsoft.com/kb/145799+Stack+Overflow\\x26amp;tbo\\x3d1\\x26amp;sa\\x3dX\\x26amp;ei\\x3dj9iHTLXlLNmXOJLQ3cMO\\x26amp;sqi\\x3d2\\x26amp;ved\\x3d0CDwQHzAG\\x22\\x3eSimilar\\x3c/a\\x3e\\x3c/span\\x3e\\x3c/span\\x3e\\x3c/div\\x3e\\x3c!--n--\\x3e\\x3c!--m--\\x3e\\x3cli class\\x3dg\\x3e\\x3ch3 class\\x3d\\x22r\\x22\\x3e\\x3ca href\\x3d\\x22http://stackoverflow.carsonified.com/\\x22 class\\x3dl onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x278\\x27,\\x27AFQjCNHcEPoch5soLj2CpLpRfnW-Z2-aLw\\x27,\\x27\\x27,\\x270CD0QFjAH\\x27)\\x22\\x3e\\x3cem\\x3eStackOverflow\\x3c/em\\x3e DevDays » Home\\x3c/a\\x3e\\x3c/h3\\x3e\\x3cdiv class\\x3d\\x22s\\x22\\x3e\\x3cem\\x3eStackOverflow\\x3c/em\\x3e Dev Days is run by Carsonified, so please give us a shout if you need anything or are interested in sponsoring the event. \\x3cb\\x3e...\\x3c/b\\x3e\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3e\\x3cb\\x3estackoverflow\\x3c/b\\x3e.carsonified.com/\\x3c/cite\\x3e - \\x3cspan class\\x3dgl\\x3e\\x3ca href\\x3d\\x22http://webcache.googleusercontent.com/search?q\\x3dcache:uhl8NPgikN0J:stackoverflow.carsonified.com/+Stack+Overflow\\x26amp;cd\\x3d8\\x26amp;hl\\x3den\\x26amp;ct\\x3dclnk\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x278\\x27,\\x27AFQjCNFf9Vl5L3FaQGPapUpIFw5gqVUCnA\\x27,\\x27\\x27,\\x270CD8QIDAH\\x27)\\x22\\x3eCached\\x3c/a\\x3e - \\x3ca href\\x3d\\x22/search?hl\\x3den\\x26amp;q\\x3drelated:stackoverflow.carsonified.com/+Stack+Overflow\\x26amp;tbo\\x3d1\\x26amp;sa\\x3dX\\x26amp;ei\\x3dj9iHTLXlLNmXOJLQ3cMO\\x26amp;sqi\\x3d2\\x26amp;ved\\x3d0CEAQHzAH\\x22\\x3eSimilar\\x3c/a\\x3e\\x3c/span\\x3e\\x3c/span\\x3e\\x3c/div\\x3e\\x3c!--n--\\x3e\\x3c!--m--\\x3e\\x3cli class\\x3dg\\x3e\\x3ch3 class\\x3d\\x22r\\x22\\x3e\\x3ca href\\x3d\\x22http://stackoverflow.org/\\x22 class\\x3dl onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x279\\x27,\\x27AFQjCNF-YrPvTLTJlFFDJrJE0cjGdlOpbg\\x27,\\x27\\x27,\\x270CEEQFjAI\\x27)\\x22\\x3e\\x3cem\\x3eStackOverflow\\x3c/em\\x3e.org\\x3c/a\\x3e\\x3c/h3\\x3e\\x3cdiv class\\x3d\\x22s\\x22\\x3e\\x3cem\\x3eStackOverflow\\x3c/em\\x3e.org began as the merging of two ideas that have been kicking around in my head for years. First, I wanted a dorky programming-related domain \\x3cb\\x3e...\\x3c/b\\x3e\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3e\\x3cb\\x3estackoverflow\\x3c/b\\x3e.org/\\x3c/cite\\x3e - \\x3cspan class\\x3dgl\\x3e\\x3ca href\\x3d\\x22http://webcache.googleusercontent.com/search?q\\x3dcache:u0dIlJW-XMYJ:stackoverflow.org/+Stack+Overflow\\x26amp;cd\\x3d9\\x26amp;hl\\x3den\\x26amp;ct\\x3dclnk\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x279\\x27,\\x27AFQjCNHcJcV2QVybr6voztyPwHCrNOOD1w\\x27,\\x27\\x27,\\x270CEMQIDAI\\x27)\\x22\\x3eCached\\x3c/a\\x3e - \\x3ca href\\x3d\\x22/search?hl\\x3den\\x26amp;q\\x3drelated:stackoverflow.org/+Stack+Overflow\\x26amp;tbo\\x3d1\\x26amp;sa\\x3dX\\x26amp;ei\\x3dj9iHTLXlLNmXOJLQ3cMO\\x26amp;sqi\\x3d2\\x26amp;ved\\x3d0CEQQHzAI\\x22\\x3eSimilar\\x3c/a\\x3e\\x3c/span\\x3e\\x3c/span\\x3e\\x3c/div\\x3e\\x3c!--n--\\x3e\\x3c!--m--\\x3e\\x3cli class\\x3dg\\x3e\\x3ch3 class\\x3d\\x22r\\x22\\x3e\\x3ca href\\x3d\\x22http://embeddedgurus.com/stack-overflow/\\x22 class\\x3dl onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x2710\\x27,\\x27AFQjCNFYQ5E8irNUCpRsbOHHyfc0oqGpWw\\x27,\\x27\\x27,\\x270CEUQFjAJ\\x27)\\x22\\x3e\\x3cem\\x3eStack Overflow\\x3c/em\\x3e\\x3c/a\\x3e\\x3c/h3\\x3e\\x3cdiv class\\x3d\\x22s\\x22\\x3e\\x3cem\\x3eStack Overflow\\x3c/em\\x3e. Nigel Jones. Nigel Jones has over 20 years of experience designing electronic circuits and firmware. (full bio). Pages. Contact Nigel. Links \\x3cb\\x3e...\\x3c/b\\x3e\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3eembeddedgurus.com/\\x3cb\\x3estack\\x3c/b\\x3e-\\x3cb\\x3eoverflow\\x3c/b\\x3e/\\x3c/cite\\x3e - \\x3cspan class\\x3dgl\\x3e\\x3ca href\\x3d\\x22http://webcache.googleusercontent.com/search?q\\x3dcache:Rl_rUfEG_fIJ:embeddedgurus.com/stack-overflow/+Stack+Overflow\\x26amp;cd\\x3d10\\x26amp;hl\\x3den\\x26amp;ct\\x3dclnk\\x22 onmousedown\\x3d\\x22return rwt(this,\\x27\\x27,\\x27\\x27,\\x27\\x27,\\x2710\\x27,\\x27AFQjCNFqMjsc1pBI9JexjMSPY7wm5QLI8w\\x27,\\x27\\x27,\\x270CEcQIDAJ\\x27)\\x22\\x3eCached\\x3c/a\\x3e\\x3c/span\\x3e\\x3c/span\\x3e\\x3c/div\\x3e\\x3c!--n--\\x3e\x27,_ss);\x3c/script\x3e"
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}/*""*/

Lectura adicional no técnica:

• Google Adwords - ¿Qué es Google Instant?
• Acerca de Google Instant

Como han dicho otros, Google está devolviendo instantáneamente los resultados para el resultado superior de lo que sugiere Google sugiere . Por lo tanto, si escribe fac , Google sugiere sugiere que está escribiendo en Facebook . Curiosamente, solo el término de búsqueda parcial, fac , se envía a Google en la solicitud JSON, por lo que Google sugiere se utiliza en ambos extremos.

Las búsquedas no se realizan realmente en cada pulsación de tecla. Si escribe lo suficientemente rápido, algunos pueden perderse.

Sospecho que esto no aumenta la carga en los servidores de Google tanto como podría pensar. La mayoría de las búsquedas adicionales son para palabras muy populares cuando comienza a escribir cosas: si comienza a buscar algo que comience con f , buscará facebook , si comienza a buscar algo que comience con ju , buscará a justin bieber . Gracias al almacenamiento en caché, estas búsquedas no son muy caras.

Es predictivo Los resultados de búsqueda son de la primera sugerencia de autocompletar (o la seleccionada si presiona la flecha hacia abajo o pasa el mouse sobre una sugerencia).

En otras palabras, si escribo "vinilo s", la primera sugerencia de autocompletar es "revestimiento de vinilo", y los resultados de la búsqueda muestran claramente una búsqueda de "revestimiento de vinilo". Si hago una búsqueda normal en Google de "vinilos", los resultados de la búsqueda son diferentes.

Entonces, Google Instant es predictivo de una manera que las búsquedas normales de Google no lo son ... busca la autocompletación sugerida en lugar de la consulta de búsqueda literal sin terminar.

La conversión del primer valor de la clave uen la respuesta Ajax de la respuesta de Daniel Vassallo proporciona una URL , que luego conduce a algún JSON (no válido). Todavía no estoy seguro de para qué sirve esta parte.

El dda un poco de HTML, que se inserta en la página. Aquí hay una versión ligeramente descomprimida . Es principalmente una etiqueta de script, que pasa en 2 fragmentos más de HTML a una función je.pa(). Estos fragmentos parecen ser los mismos que los resultados de búsqueda no instantánea.

Hace un tiempo escribí una GUI de búsqueda instantánea vagamente popular para el motor de búsqueda Solr. Es realmente simple, por lo que debería poder mirar el código y comprender los conceptos generales http://fergiemcdowall.github.io/solrstrap/