"Yet a close analysis points to a nagging performance gap that should be of concern to everyone in the area."

The study also looked at domestic funds but found the performance gap to be far smaller.

Another design problem was the increasing performance gap between the processor and main memory.

But the performance gap persists even among children of similar family income and language backgrounds.

The performance gap is also reflected in the efficiency with which the two firms used their professionals.

The more lingering problem may be the performance gap that opened up between him and the other Republican candidates in two recent debates.

There is still an outstanding issue: Will the performance gap between minority and white students close?

The performance gap between minority engineering students and white ones has been eliminated.

But since the 1980s the performance gap between processor and memory has been growing.

"The performance gap is productivity per store and profitability," he said.