Any marker manager cannot help you with millions of markers on a map.
All MM classes are based on simple premise, where you have to load all
markers into manager first, and then it balances with memory problems
in browser. But, the problem is first loading of markers, which is
simply not possible. We at Tixik.com also handle a very large portion
of markers (about 3M for now) and currently, we simply do not use any
marker manager. If this is OK for you to show about 100 markers on a
map at once, this is much better to use simple AJAX loading of markers
based on current map view, and do some caching at backend as we do. Of
course you can use marker manager for caching local bigger map areas
to load it once. If you want to see some example, check out our map at
http://en.tixik.com/m/

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