Be greeted Emil,

On Sat, Jun 8, 2019 at 9:21 AM Emil Engler via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:
Hello, I tried myself with some Bitcoin development. For this I used of
course the Bitcoin testnet. However it took me one hour to sync the
blockchain with around 1538358 blocks. In my opinion that is too much
for a testnet. Especially the blockchain size with around 26GB is so
much. Would it be possible to reset the testnet with a new genesis block
? And if so, can we setup a fixed cycle for resetting the testnet (For
example every second 1st of January) ?

At the moment, I somewhat doubt this is likely to happen. Signet provides an alternative for configuring multiple separate private and public testing networks. If you would like to get involved, check out the recent discussion on the topic recorded here:
http://diyhpl.us/wiki/transcripts/bitcoin-core-dev-tech/2019-06-07-signet/

- Bryan
http://heybryan.org/