# Programmable bootstrapping

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

{% hint style="info" %}
All GPU benchmarks were launched on H100 GPUs, and rely on the multithreaded PBS algorithm with a grouping factor set to 4.
{% endhint %}

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

![](/files/sl8C0tWrrX76QdeLA4xp)

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

![](/files/r0B00uT0rbROomvnqtge)

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

![](/files/PWwgrPIlDULVxGc9XUBi)

## Reproducing TFHE-rs benchmarks

**TFHE-rs** benchmarks can be easily reproduced from the [source](https://github.com/zama-ai/tfhe-rs).

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

```shell
#PBS benchmarks:
make bench_pbs_gpu

#KS-PBS benchmarks:
make bench_ks_pbs_gpu
```


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