Increase Block Limits Again ™️

[bw-solana]

Now that 200ms is live on mainnet, skip rates look good, and slot times are reasonable.. it is time to run CUs back to 100M turbo speed ☔ ☔

I propose only increasing the block CU limit while keeping other related params constant. e.g. shred limit, single account CU limit, etc. do not increase.

This is because:

1. we know we have a lot of overall replay execution headroom
2. we do not have a ton of linearized execution headroom (currently 20M CUs linearized for 200ms slots)
3. it is not clear how much network bandwidth headroom we have before some NICs start redlining. We also never even approach the current shred limit outside of synthetic testing anyways

I also propose doing this through a ladder of 5 feature gates:

• 50M CU baseline
• 60M
• 70M
• 80M
• 90M
• 100M

[topointon-jump]

Ship it 🚀 🚀🚀

[rndrntwrk]

ibrl