Hi Peter, This question is for you. :)
I guess MMapDataAccess is mainly designed for running Graphhopper on Android device, which you can't load all the data into the limited memory. In the comment of MMapDataAccess: This is a data structure which uses the operating system to synchronize between disc and memory. Use SynchDAWrapper if you intent to use this from multiple threads! why GH need a thread-safe one, somebody want to do the extract on Android device? just curious. Thanks in advance. *Best Regards,* *ZhiQiang ZHAO*
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