Benchmarking Ci4 router

symfony version 4.3 -4.4 symfony has second higher memory usage  after ci4. 
Symfony not my favorite, request class is also fat eating a lot of memory
France has  36,681 communes, 101 departments, 26 regions.
I have a classified website where city name is the lroute
Altorouter has the best results/sec and lowest memory usage. Same 35 000 routes  for all router tests ,but Altorouter with some optimizations  can match 150 000 routes on a  1.350.000 /second  speed 
Ill put the tests on github
 One option is to use controllers as second  routers and  split the number of routes  , not to match all in front router
Same work in progress with my website ,looking for the best option
 The Ci 4 file cache is the fastest around on par with doctrine cache (but doctrine has advantage of spliting the files across multiple directories ,) phpfastcache the slowest and the fattest