Initialize EpochCache in transition_blocks if `exclude_cache_buil…

…ds` is enabled

README.md

@@ -16,11 +16,6 @@ An open-source Ethereum consensus client, written in Rust and maintained by Sigm
 
 ![Banner](https://i.postimg.cc/hjdTGKPd/photo-2020-10-23-09-52-16.jpg)
 
-| | `unstable` | `tree-states-fast`|
-| ----------- | ----------- | ------ |
-| Process Block | | 9 - 10 ms |
-| Post-block tree hash | | ~5ms |
-
 ## Overview
 
 Lighthouse is:

consensus/types/src/epoch_cache.rs

@@ -58,7 +58,6 @@ impl EpochCache {
         }
     }
 
-    // TODO: check at start of block processing
     pub fn check_validity<E: EthSpec>(
         &self,
         current_epoch: Epoch,

lcli/src/transition_blocks.rs

@@ -72,6 +72,7 @@ use eth2::{
     BeaconNodeHttpClient, SensitiveUrl, Timeouts,
 };
 use ssz::Encode;
+use state_processing::epoch_cache::initialize_epoch_cache_if_required;
 use state_processing::{
     block_signature_verifier::BlockSignatureVerifier, per_block_processing, per_slot_processing,
     BlockSignatureStrategy, ConsensusContext, StateProcessingStrategy, VerifyBlockRoot,
@@ -351,9 +352,16 @@ fn do_transition<T: EthSpec>(
     let mut ctxt = if let Some(ctxt) = saved_ctxt {
         ctxt.clone()
     } else {
-        ConsensusContext::new(pre_state.slot())
+        let ctxt = ConsensusContext::new(pre_state.slot())
             .set_current_block_root(block_root)
-            .set_proposer_index(block.message().proposer_index())
+            .set_proposer_index(block.message().proposer_index());
+
+        if config.exclude_cache_builds {
+            let epoch = pre_state.current_epoch();
+            initialize_epoch_cache_if_required(&mut pre_state, epoch, spec)
+                .map_err(|e| format!("{e:?}"))?;
+        }
+        ctxt
     };
 
     if !config.no_signature_verification {