Is it expected that KMZ performance is significantly slower than KML?

KennSebesta — Tue, 10 Aug 2021 16:27:32 GMT

When I open KMZ files it takes several minutes, but when I load their non-compressed equivalent KML file it's instantaneous.

I have attached a 7MB KMZ which illustrates the problem. This file takes several minutes on my computer to open, but when I unzip it and use the internal `doc.kml` file directly it takes seconds. I have other KMZ files which exhibit similar delays in opening.

As a way of benchmarking, Google Earth loads both the KMZ and the KML in just a few seconds.

The KMZ is a very simple hierarchy of NetworkLink tags and associated image tiles.

P.S. The attached file had to have `.zip` appended to its name in order to upload to the site. Simply remove the `.zip` and it will function like a normal KMZ file. (And for those not familiar, decompress any KMZ to turn it into a KML.)

Re: Is it expected that KMZ performance is significantly slower than KML?

GuillaumeBelz — Fri, 20 Aug 2021 18:31:57 GMT

Hi Kenn,

I can reproduce the performance issue on Mac for C++ and QML APIs. We will investigate that.

Thank you

Guillaume

topic Is it expected that KMZ performance is significantly slower than KML? in Qt Maps SDK Questions

Is it expected that KMZ performance is significantly slower than KML?

Re: Is it expected that KMZ performance is significantly slower than KML?