China's rise to the Top 500 supercomputing list in November got the attention of President Barack Obama, who's using the news to underscore concerns about America's global standing as a competitive power.
Obama has has twice mentioned China's move to the top of the supercomputer list in recent days—once in a speech and again a press conference. Other administration officials have made note of China's displacement of the U.S. atop the list as well.
The increasing attention on high-performance computing rankings as an indication of global leadership is raising a broader question. How is supercomputer performance best measured?
The answer is not so simple.
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