What this test does
An order, its acknowledgement, one client clock.
The common HP transport campaign measures scheduled NewOrderSingle → ExecutionReport response latency. The server derives the reply from the received order; scheduler delay, message construction, both endpoints and the network path are included.
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View captured FIX messages for this workflow
Captured sample FIX messages
One complete, correlated chain from the synthetic QuickFIX/C++ functional audit. These are actual captured bytes illustrating the current canonical wire shape, not messages from the older transport campaign or measured latency samples.
The acknowledgement echoes order 11=1, symbol LCOM1, buy side, quantity 1000 and price 10000.00000. ExecType 150=0 and OrdStatus 39=0 mean New: CumQty is 0, LeavesQty is 1000 and AvgPx is 0. No LastQty/LastPx fill fields are present.
1. CLIENT → SERVER · NewOrderSingle 35=D
8=FIX.4.4|9=132|35=D|34=2|49=CLIENT|52=20261003-00:42:20.433|56=SERVER|
11=1|21=1|38=1000|40=2|44=10000.00000|54=1|55=LCOM1|60=20260703-12:00:00.000|
10=201| 2. SERVER → CLIENT · ExecutionReport · New acknowledgement 35=8
8=FIX.4.4|9=182|35=8|34=2|49=SERVER|52=20261003-00:42:20.433|56=CLIENT|
6=0.00000|11=1|14=0|17=TCP-EXEC|37=TCP-ORDER|38=1000|39=0|44=10000.00000|54=1|55=LCOM1|60=20260703-12:00:00.000|150=0|151=1000|
10=060| | represents SOH (ASCII 0x01). Remove display line breaks and restore SOH to recover the exact message, including valid BodyLength (9) and CheckSum (10). FIX SendingTime (52) is a wall-clock field, not the monotonic measurement clock: do not subtract these timestamps to estimate latency. Tag 60 retains the fixed July fixture time.
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Qualified transport reference
Retained HP open-loop campaign, 20 September 2026; 50,000 requests/s. Newer full-session tests have not supplied a replacement passing distribution. Rows below are not a current four-flow competitor ranking.
| Transport | p50 (µs) | p99 (µs) | p99.9 (µs) | Maximum (µs) |
|---|---|---|---|---|
| Kernel TCP | 14.504 | 15.876 | 18.233 | 64.199 |
| Solarflare Onload | 6.491 | 6.870 | 6.961 | 19.418 |
| Mellanox VMA | 6.979 | 7.166 | 7.265 | 17.736 |
| Solarflare TCPDirect | 5.869 | 6.029 | 6.088 | 12.072 |
| Mellanox SocketXtreme | 6.905 | 7.575 | 8.731 | 19.533 |
Latest codec measurements
Qualified 25-adapter converted-values-v2 campaign, 3 October 2026. The native-backed flavors have their own measured interop rows. Historical codec tables and unsupported llfix session figures are not projected here.
Current full-session admission
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