JSROOT hangs with TTree::Draw 0%

[linev]

See my reply in other thread:

Reading from http very slow

Probably I have an idea. cernbox does not accept Ranges in the requests and always return full file content. Even when it declares Accept-Ranges in the response headers. JSROOT has workaround - it request complete file content once and then reusing it. Of course, this does not work for large files. ROOT does not have such workaround and for each small request gets full content again and again. Therefore it may take very long time to process such file. Therefore I will not recommend to use …

Because of current cernbox limitations it is very inefficient to use it for large files.
As it is now, any ROOT file need to be completelty download by JSROOT before it can be used.