# Florence, the latest Tezos upgrade, is LIVE

**URL:** https://forum.tezosagora.org/t/florence-the-latest-tezos-upgrade-is-live/3113
**Category:** Research and Development
**Created:** [May 11, 2021, 1:48am UTC](https://forum.tezosagora.org/t/florence-the-latest-tezos-upgrade-is-live/3113 "2021-05-11T01:48:06Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![NomadicLabs](https://forum.tezosagora.org/user_avatar/forum.tezosagora.org/nomadiclabs/32/763_2.png) [@NomadicLabs](https://forum.tezosagora.org/u/NomadicLabs)
#### Post date: [May 11, 2021, 1:48am UTC](https://forum.tezosagora.org/t/florence-the-latest-tezos-upgrade-is-live/3113/1 "2021-05-11T01:48:06Z")

</div>

_This is a joint announcement from Nomadic Labs, Marigold, DaiLambda and Tarides._

On 11 May 2021, the Tezos blockchain successfully upgraded by adopting **Florence** at block #1,466,369. Florence was jointly developed by [Nomadic Labs](https://www.nomadic-labs.com/), Marigold, [DaiLambda](https://www.dailambda.jp/) and [Tarides](https://tarides.com/). It follows the [Edo protocol upgrade](https://tzstats.com/protocols/PtEdo2ZkT9oKpimTah6x2embF25oss54njMuPzkJTEi5RqfdZFA) three months ago, and will be the sixth Tezos upgrade in two years (overviews [here](https://tzstats.com/protocols/) and [here](https://tezos.gitlab.io/protocols/naming.html)).

Florence includes [several bug fixes and small improvements](http://doc.tzalpha.net/protocols/009_florence.html) and includes the following substantive changes:

- Depth First Execution Order: Florence changes the [calling convention to _depth first_ execution order](https://blog.nomadic-labs.com/tezos-calling-convention-migrating-from-breadth-first-to-depth-first-order-bfs-to-dfs.html), making smart contract development easier and more intuitive.

- Increased Maximum Operation Size: Florence increases the maximum size of an operation to [32kB](http://doc.tzalpha.net/protocols/009_florence.html//#increase-max-operation-data-length-to-32kb) (from 16kB in Edo). In particular, this roughly doubles the maximum size of a smart contract, which may be relevant to developers with complex smart contract applications.

- Gas Optimizations: The gas accounting subsystem includes further optimizations. Notably, gas consumption is computed using saturation arithmetic, leading to [significant speedups and efficiencies](https://blog.nomadic-labs.com/sound-and-fast-gas-monitoring-with-saturation-arithmetic.html).

- [No More Test Chain](http://doc.tzalpha.net/protocols/009_florence.html/#governance): The test chain is removed, simplifying the amendment protocol, and voting periods are renamed as follows:

| Edo | Florence |
| --- | --- |
| Proposal | Proposal |
| Testing\_vote | Exploration |
| Testing | Cooldown |
| Promotion\_vote | Promotion |
| Adoption | Adoption |

The [Florence](https://tarides.com/blog/2021-03-04-florence-and-beyond-the-future-of-tezos-storage) protocol amendment, and related updates, were developed by programmers from Nomadic Labs, DaiLambda, Marigold, Tarides; and by an external contributor, [Keefer Taylor](https://gitlab.com/keefertaylor), to whom the proposals grant an invoice of ꜩ100 for his merge request that increased the maximum operation size.

Congratulations and welcome to the Tezos blockchain, **Florence**!

In the next few weeks we intend to inject our next proposal **Granada** , with yet more interesting features, large and small. Stay tuned, and happy baking!