consuming 100% CPU.

it was fine before it got takedown when i install this extension again i notice it takes more time then usual in opening tab. whenever i open new tab chrome hanging for few seconds until this extension loads it's stuff and task manger showing that chrome consuming 100% cpu please fix this in case you read this and need my laptops specs

lenovo thinkpad w520.

core i7-2820qm 2.3GHz, 4Gb ram, windows 7 ultimate