Alex Sharov b3aca15ff8 e2: ReadAhead of blocks, senders accounts, code (#7501) ... It improves performance of initial sync (stage exec) by 5-20% when blocks snapshots are mounted to high-latency drive and when chaindata is on high-latency drive. And improving cold-start performance. Current implementation using 2 goroutines for ReadAhead. It also producing more garbage, can improve it later (here are dashboard with impact). ``` mainnet2-1: with ReadAhead mainnet2-3: no ReadAhead ``` <img width="949" alt="Screenshot 2023-05-12 at 09 24 31" src="https://github.com/ledgerwatch/erigon/assets/46885206/b90b1fa8-9099-48ff-95b3-86e864a36d46"> <img width="845" alt="Screenshot 2023-05-12 at 09 24 13" src="https://github.com/ledgerwatch/erigon/assets/46885206/39d90c0c-a9d5-4735-8c03-da1455b147aa">		2023-05-15 15:08:35 +07:00
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snap	e3: prepare downloader for extraction (#6061)	2022-11-16 15:48:23 +03:00
snapcfg	Remove BSC support in Erigon (step 1) (#7246)	2023-04-03 14:46:21 +00:00
block_reader.go	e2: ReadAhead of blocks, senders accounts, code (#7501)	2023-05-15 15:08:35 +07:00
block_snapshots_test.go	fix lint	2023-01-22 20:47:36 +07:00
block_snapshots.go	e3: print background indexing logs in e2 style (summary of all files progress in 1 line) (#7256)	2023-04-05 04:49:02 +00:00