Implement standardized JSON format for slow block logging to enable
cross-client performance analysis and protocol research.
This change is part of the Cross-Client Execution Metrics initiative
proposed by Gary Rong: https://hackmd.io/dg7rizTyTXuCf2LSa2LsyQ
The standardized metrics enabled data-driven analysis like the EIP-7907
research: https://ethresear.ch/t/data-driven-analysis-on-eip-7907/23850
JSON format includes:
- block: number, hash, gas_used, tx_count
- timing: execution_ms, total_ms
- throughput: mgas_per_sec
- state_reads: accounts, storage_slots, bytecodes, code_bytes
- state_writes: accounts, storage_slots, bytecodes
- cache: account/storage/code hits, misses, hit_rate
This should come after merging #33522
---------
Co-authored-by: Gary Rong <garyrong0905@gmail.com>
This PR extends the statistics of contract code read by adding these
fields:
- **CacheHitBytes**: the total number of bytes served by cache
- **CacheMissBytes**: the total number of bytes read on cache miss
- **CodeReadBytes**: the total number of bytes for contract code read
This PR introduces a new debug feature, logging the slow blocks with
detailed performance statistics, such as state read, EVM execution and
so on.
Notably, the detailed performance statistics of slow blocks won't be
logged during the sync to not overwhelm users. Specifically, the statistics
are only logged if there is a single block processed.
Example output
```
########## SLOW BLOCK #########
Block: 23537063 (0xa7f878611c2dd27f245fc41107d12ebcf06b4e289f1d6acf44d49a169554ee09) txs: 248, mgasps: 202.99
EVM execution: 63.295ms
Validation: 1.130ms
Account read: 6.634ms(648)
Storage read: 17.391ms(1434)
State hash: 6.722ms
DB commit: 3.260ms
Block write: 1.954ms
Total: 99.094ms
State read cache: account (hit: 622, miss: 26), storage (hit: 1325, miss: 109)
##############################
```
