Programmable bootstrapping

This document details the CPU performance benchmarks of programmable bootstrapping and keyswitch operations using TFHE-rs.

All CPU benchmarks were launched on an AWS hpc7a.96xlarge instance equipped with two 48-core AMD EPYC 9R14 CPU @ 2.60GHz and 740GB of RAM.

The next tables show the execution time of a single programmable bootstrapping as well as keyswitch followed by a programmable bootstrapping depending on the precision of the input message. The associated parameters set are given. The configuration is tfhe-fft + AVX-512.

Note that these benchmarks use Gaussian parameters. MB-PBS stands for multi-bit programmable bootstrapping.

P-fail: $2^{-40}$

P-fail: $2^{-64}$

P-fail: $2^{-128}$

Reproducing TFHE-rs benchmarks

TFHE-rs benchmarks can be easily reproduced from the source.

AVX512 is now enabled by default for benchmarks when available

The following example shows how to reproduce TFHE-rs benchmarks:

#PBS benchmarks:
make bench_pbs

#KS-PBS benchmarks:
make bench_ks_pbs