Rate primes_all         ch         jg    ch_opt2
primes_all 1.75/s         --       -96%       -97%       -97%
ch         49.8/s      2751%         --        -4%       -11%
jg         51.9/s      2869%         4%         --        -8%
ch_opt2    56.2/s      3117%        13%         8%         --