I cant see correctly tiles for points/lines

[publicocean0]

Hi we developped a web project for showing all flight obstacles in my region.
I used leaflet for rendering them after that all are loaded using ajax because i can filter them with many options.
All it is ok but the dataset is so huge that requires many minutes for rendering them when i m at zoom level of region or province.
The dataset is composed by points(500k ) and lines(500k) and we have 7 provinces.
So i m trying to use your basic script for understanding if it can help to reduce the time for rendering them with low zoom level.
I used your debug page and dragged lines but i cant see anything . The script is very fast for preprocessing anyway for bothgeojson (points and lines).
Using points i can see them initially but when i click i see just empy tiles