Regular artifact on repetition 2689 with scala-doku

[ceresek]

Just making a note of this (not sure we have a good place to store such observations). When executed with OpenJDK 11 (11.0.15+8-LTS-149) on a set of dedicated machines (Intel Xeon E3-1230 v6, Fedora 35), the scala-doku benchmark exhibited a regular shift in performance (slowdown around 5-6 percent) at repetition 2689 (a little bit less than 4 hours into the execution, depending on actual speed), in 76 otherwise independent executions (Renaissance 0.14.1 dde0f7af00738e640ae0acf68ab66decc8249e15). This was the only benchmark from the entire suite with this type of behavior.