W3C Trace Context's made simple
This is free to use software, but if you do like it, consider supporting me ❤️
- npm — available as
tctx - JSR — available as
@mr/tracecontext
// producer
import * as traceparent from 'tctx/traceparent';
import * as tracestate from 'tctx/tracestate';
fetch('/api', {
headers: {
traceparent: traceparent.make(),
tracestate: tracestate.make({ key: 'value' }),
},
});
// consumer
import * as traceparent from 'tctx/traceparent';
import * as tracestate from 'tctx/tracestate';
const parent_key = traceparent.parse(request.headers.traceparent);
const parent_state = tracestate.parse(request.headers.tracestate);
parent_state.set('vendor', 'value');
fetch('/downstream', {
headers: {
traceparent: parent.child(),
tracestate: parent_state,
},
});benchmark time (avg) iter/s (min … max) p75 p99 p995
------------------------------------------------------------------- -----------------------------
group make
tctx 488.04 ns/iter 2,049,021.8 (477.8 ns … 540.92 ns) 490.45 ns 527.86 ns 540.92 ns
traceparent 6.08 µs/iter 164,346.2 (5.88 µs … 6.46 µs) 6.17 µs 6.46 µs 6.46 µs
trace-context 1.35 µs/iter 743,381.3 (1.33 µs … 1.46 µs) 1.35 µs 1.46 µs 1.46 µs
summary
tctx
2.76x faster than trace-context
12.47x faster than traceparent
group parse
tctx 265.57 ns/iter 3,765,435.2 (260.82 ns … 285.88 ns) 269.13 ns 273.34 ns 285.88 ns
traceparent 5.09 µs/iter 196,302.6 (4.88 µs … 5.36 µs) 5.18 µs 5.36 µs 5.36 µs
trace-context 240.18 ns/iter 4,163,540.7 (237.21 ns … 300.23 ns) 238.89 ns 276.17 ns 297.94 ns
summary
trace-context
1.11x faster than tctx
21.21x faster than traceparent
group child
tctx 724.74 ns/iter 1,379,804.8 (709.77 ns … 752.56 ns) 733.47 ns 752.56 ns 752.56 ns
traceparent 8.18 µs/iter 122,254.2 (7.99 µs … 8.77 µs) 8.24 µs 8.77 µs 8.77 µs
trace-context 1.99 µs/iter 502,728.4 (1.96 µs … 2.05 µs) 1.99 µs 2.05 µs 2.05 µs
summary
tctx
2.74x faster than trace-context
11.29x faster than traceparent
MIT © Marais Rossouw