SAN FRANCISCO — Google Inc. is still spending money like the recession is a distant memory, but investors can't complain too much as long as the Internet search leader keeps expanding its advertising empire like it did in the summer.

The evidence of Google's dominance — and prosperity — emerged in its third-quarter results released late Thursday. The performance marked the latest sign that the technology industry is rolling again.

Its shares climbed $55, or more than 10 percent, to $590.93 in morning trading Friday.

Net income surged 32 percent to trounce analyst estimates, and would have been even higher if Google's management had not hired more workers, bought other companies and invested in more equipment.