3 ms·

This is the convention when talking about speedup in software. 1x speedup means identical time. [1] https://en.wikipedia.org/wiki/Speedup https://en.wikipedia.

• baddox 11y ago
  I agree based on my experience reading these types of comparisons. I've never thought there was any ambiguity to saying "1.6 times faster." It means performance_1 = performance_0 * 1.6.
• venning 11y ago
  If the phrase was "1.6x speedup" then I would agree and not have commented. But the phrase is "1.6x faster", which is a bit ambiguous. That there is disagreement among the commentariat both ways is indicative of ambiguity. (Though, I am assuming no trolling here.) While not exactly analogous, try replacing it with a percentage and re-evaluate: What does "60% faster" mean and what does "160% faster" mean?
• erydo 11y ago
  They did say "1.6x faster", not using the term "speedup" (which is terrible nomenclature too, but that's not the point). To say that something that's no faster is identical to something that's "1x faster" is a terrible confusion of thought. It's reasonable to expect that, for example, "1x faster" would mean "for a baseline of 1 operation per second, it's faster by 1 operation per second, i.e. a total of 2 operations per second." EDIT: Oh god, that's even before I saw the "1.2x slower" entries…