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GeezerVison is showing github.com — Minimal changes required to implement Foreign Function and Memory API by stroomdev66 · Pull Request #258 · lmdbjava/lmdbjava

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@stroomdev66

@stroomdev66 stroomdev66 commented Oct 24, 2025

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This PR represents the most minimal changes required to migrate LmdbJava to use the new Java 25 Foreign Function and Memory API and remove Unsafe. From a user perspective there is very little API change other than the requrement to use a memory Arena in some places.

At present the performance lags behind the previous version by about 30% in many scenarios. This is down to two things:

  1. The fundamental Java FFM API appears to be a small percentage slower.
  2. The removal of Unsafe has resulted in the need for additional object creation rather than the ability to constantly reuse buffers and repoint addresses.

We are in the process of addressing some of these issues and improving some other areas of the codebase to compensate.

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@stroomdev66
Minimal changes required to implement Foreign Function and Memory API
c178d6c
@stroomdev66 stroomdev66 self-assigned this Oct 24, 2025
@at055612 at055612 mentioned this pull request Oct 24, 2025
Java 25, the Foreign Function & Memory API and removal of Unsafe #259
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@stroomdev66
stroomdev66 merged commit 0c82e3f into lmdbjava:java-foreign-function-and-memory-api Oct 30, 2025
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