Be able to skip compiling fermion instantiations altogether#485
Merged
paboyle merged 1 commit intopaboyle:developfrom Feb 25, 2026
Merged
Be able to skip compiling fermion instantiations altogether#485paboyle merged 1 commit intopaboyle:developfrom
paboyle merged 1 commit intopaboyle:developfrom
Conversation
edbennett
force-pushed
the
skip-fermion-instantiations
branch
from
4d48aed to
088f4da
Compare
edbennett
force-pushed
the
skip-fermion-instantiations
branch
from
088f4da to
1b56f6f
Compare
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Fermion instantiations get expensive to compile at large$N_c$ . This PR adds the facility to skip their compilation altogether, by passing
--disable-fermion-instantiationsat configure time. This substantially speeds up compilation, going from runningmake -j32to havinglibGrid.ain two minutes on Tursa.This is beneficial to those working on pure gauge problems, or optimising gauge actions, as it avoids needing to wait for unused instantiations to compile. It can also speed up installation of tooling that instantiates all the fermions that it needs to make use of (e.g. because it works at multiple values of Nc).
Guards are placed around all tests/benchmarks/examples making use of fermion instantiations such that
makeexits successfully, although obviously not all generated executables are functional.