Cinebench is terrible benchmark

By: hobold (hobold.delete@this.vectorizer.org), October 10, 2020 11:33 am
Room: Moderated Discussions
David Kanter (dkanter.delete@this.realworldtech.com) on October 10, 2020 10:36 am wrote:

> Cinebench is a total rubbish benchmark!

It happens to correlate very well with one or two workloads I care about. So for me it's been a useful benchmark, giving me a good idea of the performance I can expect.

But like any performance metric (and like any benchmark), Cinebench tries to do an impossible thing when it maps "computing speed" to one single real number. That loses all information about specific strengths and weaknesses of different machines.

Projecting a vector of many real numbers down to one single real number is always an information loss. (And one could argue that the "true" performance profile isn't fully captured by a vector of microbenchmarks in the first place.)

Of course there can be many other ways in which a benchmark is bad. But from that point of view the statement quoted above does not contain enough information for further discussion.
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