Paired native/WASM UDP probe
This fixed, bounded probe is used by the controlled latency experiment.
It echoes a 32-hex-character nonce and sequence in 1 KiB UDP datagrams and emits
one JSON report. latency sends twelve probes with 400 ms read deadlines;
both also sends a 32 KiB burst with a ten-second collection deadline.
Timeouts remain missing observations. Invalid echo identities and non-timeout
transport errors fail the command.
Build from the repository root:
go build -o latency-native ./examples/debuglets/go/latency/evaluation
make wasm SAMPLE_DIR=examples/debuglets/go/latency/evaluation
Arguments are TARGET NONCE latency|both. The controlled experiment owns the
echo target and network conditions; use its lane for reproducible baseline
comparisons. The existing parent TCP latency example keeps its own interface.