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A comment on Java is better than C++ for high speed trading systems. Parent comment

Re:Java is better than C++ for high speed trading systems by toolslive on Thursday November 26, 2020 @07:14AM (#25219276) 

    - raw, unshared access to devices.
    - no more interrupts.
You can get really close to this via virtualization though. Run a guest machine without operating system on the hypervisor. It doesn't even have to be low level code to get most of the benefits (for example MirageOS)
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Re:Java is better than C++ for high speed trading systems by chrisseaton on Thursday November 26, 2020 @09:07AM (#25220116)
> raw, unshared access to devices

Get to OS to set up DMA for you.

> no more interrupts

If the OS has no need to interrupt you, it will never interrupt you. The OS doesn't context switch from a usefully running application on its own core unless you ask it to.

Don't need virtualisation.

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