26th April 2011, 22:19
iPhone location tracking
First, slightly off-topic self-promotion:
There's been a lot of talk recently about how iPhone backups contain a full history of everywhere you've been. There has even been apps to visualise this.
Second, the compression angle:
In doing this I met the binary sqlite btree db format for the first time. And I wondered how well conventional compressors do modelling btree dbs, how well delta updates compute and whether there are any specialised compressors and differs for db files?