This was a great read. Previously I have implemented some IoT telemetry using a simple protobuf spec using delta encoding and batching a few samples together fo

This was a great read. Previously I have implemented some IoT telemetry using a simple protobuf spec using delta encoding and batching a few samples together for each send, so it sends a lot of zeros. Protobuf uses variable length encoding so most small integers will be sent as 1 byte. The first 16 in the spec use 1 byte overhead to show there is a non-zero value, and subsequent use 2 bytes. So you want to pack all your mostly-zero (or zero deltas) values at the end of the packet, and use the first 16 for your commonly changed values. And it's always useful to determine your desired data resolution and just convert a potential 8-byte double to 2 or maybe 3 bytes length integer (with a fixed multiplication). This also works storing in SQLite: use a View to read out the values in the end-format, and store them as integers in a raw table. This was _good enough_ for what I was doing but it's great to see how far you can go if you need extreme.