Performance Lag while building the Canonical Examples on Ubuntu 20.0.0 LTS Locally about fully-homomorphic-encryption HOT 1 CLOSED

Indeed, in our continuous builds, a fresh build + running all tests on Ubuntu 16.04.7 LTS takes almost 3 hours. I believe most of the runtime is due to the fact that the project compiles LLVM from scratch, which is a very large project. However, after the first successful build of LLVM on your machine, the compiled objects will be cached by bazel and not built again by default.

One thing you can try is compiling subsets of the project at a time (e.g., bazel build @yosys//:all, bazel build @abc//:all, bazel build @openfhe//:all, etc.). Future builds will use the cached results.

Bazel has a means to link with a pre-compiled libraries, but I have not tried it on this project. If it works, it would likely substantially reduce the build time. I understand this is frustrating, but we don't have any more specific guidance at this time.

from fully-homomorphic-encryption.