dygraphs has always been written with large data sets in mind, and so it does quite well on these benchmarks. The one million point benchmark is particularly good:
dygraphs was the only library to complete the 1M point benchmark on 3/5 browsers, and was 6x faster than the competition on one of the others. There are a few tricks that we use to keep dygraphs running fast on large data sets. These are mostly under-the-hood, but they'll be great fodder for a future blog post.