As spyder says in another thread of this post, on the given page (http://congressoamericano.blogspot.fr/p/fotos-do-congresso-a...) Chrome decodes and decodes... the memory usage goes up and up. I was using 1.5GO of memory before closing it (and still far from having loaded everything).

Chrome did a variant of this (at least) the last year. Not sure how comparable. See WebKit bug 94240 for example.