As someone formerly in that space I don't think so, assuming by "traders" you mean the prop firms who actually need the speed advantage. You can always arrange for the logging to happen outside the critical path, which is a tiny minority of the code you run. And you will do that if its necessary to gain a fraction of a microsecond on a competitive trade. Even if it's just being able to run a build with logging off for special cases.
For a looser definition of "traders" that includes dark pool operators and exchanges, then sure. Writing logs was definitely the bottleneck at one major European exchange for some years. They may not be able to turn off logging for regulatory reasons, but they also don't care so much about the microseconds. In this case they could definitely have improved performance with horizontal scaling (have each computer handle fewer stock symbols) but didn't consider that economically justified.
By traders I mean "anyone who doesn't sit on the market side of my network card", so a wide variety of firms. My comment about darkpools was tangential but there's a couple of them who aren't exactly known for running a tight ship.
>You can always arrange for the logging to happen outside the critical path, which is a tiny minority of the code you run. And you will do that if its necessary to gain a fraction of a microsecond on a competitive trade. Even if it's just being able to run a build with logging off for special cases.
Yes you can do that. Yes you'd think that anyone for whom it would be beneficial would do that... but you'd be surprised how often people run with logs cranked to 11 in prod.
For a looser definition of "traders" that includes dark pool operators and exchanges, then sure. Writing logs was definitely the bottleneck at one major European exchange for some years. They may not be able to turn off logging for regulatory reasons, but they also don't care so much about the microseconds. In this case they could definitely have improved performance with horizontal scaling (have each computer handle fewer stock symbols) but didn't consider that economically justified.