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Avoid unnecessary memory copies #671

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Enhancement
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Open
Avoid unnecessary memory copies#671
Enhancement
0 of 1 issue completed
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andreiltd
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area/performanceAddresses performancelifecycle/confirmedBug is verified or proposal seems reasonable
Milestone
v1.0.0

Description

@jsturtevant
jsturtevant
opened on Jun 27, 2025

Currently, we make many redundant memory copies when transferring data in and out of the guest. While we're using flatbuffers for serialization, we're not leveraging its full benefits. APIs such as call_guest_func should accept parameters by reference instead of by value, since the data needs to be serialized anyway.

Created from #433

Activity

  1. jsturtevant
    added
    area/performanceAddresses performance
    on Jun 27, 2025
  2. jsturtevant
    added the
    Enhancement
    issue type on Jun 27, 2025
  3. github-actions
    added
    lifecycle/needs-reviewThe issue has not yet been reviewed.
    on Jun 27, 2025
  4. jsturtevant
    added this to Hyperlight Milestoneson Jun 27, 2025
  5. jsturtevant
    added
    lifecycle/confirmedBug is verified or proposal seems reasonable
    and removed
    lifecycle/needs-reviewThe issue has not yet been reviewed.
    on Jun 27, 2025
  6. jsturtevant
    added this to the Upcoming milestone on Jun 30, 2025
  7. jsturtevant
    modified the milestones: Upcoming, v0.9.0 on Jul 29, 2025
  8. danbugs
    assigned
    ludfjig
    on Aug 6, 2025
  9. danbugs
    modified the milestones: v0.9.0, v0.10.0, Tracking on Aug 27, 2025
  10. ludfjig
    modified the milestones: Tracking, 1.0 on Jun 18, 2026
  11. ludfjig
    added this to Hyperlight Roadmapon Jun 18, 2026

  12. ludfjig commented on Jun 18, 2026

    @ludfjig
    ludfjig
    on Jun 18, 2026
    Contributor

    I'm adding this to 1.0 milestone, because if we want to optimize the guest-host, it probably involves breaking the guest-host ABI (for example if switching to serde instead of flatbuffer), and would be a huge breaking change for existing snapshots, so couldn't be done after 1.0 (until 2.0)

  13. ludfjig commented on Jul 1, 2026

    @ludfjig
    ludfjig
    on Jul 1, 2026
    Contributor

    this issue also involves investigating serde instead of flatbuffer

  14. ludfjig
    added a sub-issue on Jul 1, 2026
  15. ludfjig
    assigned
    andreiltd
    and unassigned
    ludfjig
    on Jul 1, 2026
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