You did not point out any inaccuracy, you literally made baseless comment about it being "up to 5 times" slower without providing an example where that's the case.

"That's just rude" - oh my, never though asking for evidence of a performance problem on HN would be "rude". And yes, if something is actually 5x slower, it's very likely a performance bug that can be fixed, as FillC's author has made it clear in several opportunities.