Still better than AoE II HD (fuck Steam).

Blame Adobe, Flash Player is the problem. It uses resources insanely, specially Peeper version (used by Chrome and clones). Atom 1.6Ghz with the same issue, but this time the fault came from Intel (linux drivers sucks horrible, worse than Windows version).

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UPDATE: Seamonkey (recent versions) and old 11.2 Flash (last one for Linux) worked better on poor machines like my Atom. I assume that info can be useful in Windows.