Do researchers reuse benchmark results for existing algorithm when comparing with their algorithm?
Quoting the results from another paper (with citation) is all right, but using it in the benchmark comparison table is something which is practiced in research?


I would wager it is not done enough. It is certainly ok, even required, to compare your results to earlier work, and the more fair and unbiased you can do this, the better. It is perfectly acceptable to say "on the right-hand side of Table XY, we report the results for this problem previously achieved in [1]" (and then list them exactly as reported).

The one thing to make sure, though, is that when you want to say that you are better than a previous work, the comparison is actually fair. For instance, one sometimes sees papers where the authors use a long-running deterministic algorithm (which you need a map/reduce cluster to execute on) and claim that their work is better than an earlier heuristic approach, which was built for speed and on-line execution. Don't do that.