fix: increase default number of proving agents

yarn-project/end-to-end/Earthfile

@@ -6,9 +6,11 @@ E2E_COMPOSE_TEST:
   ARG compose_file=./scripts/docker-compose.yml
   ARG debug="aztec:*"
   ARG EARTHLY_TARGET_NAME
+  ARG prover_agents=10
   LOCALLY
   ENV TEST=$test
   ENV DEBUG=$debug
+  ENV PROVER_AGENTS=$prover_agents
   LET project_name=$(echo $test | sed 's/\./_/g')
   IF docker compose > /dev/null 2>&1
     LET CMD="docker compose"

yarn-project/prover-client/src/prover-pool/prover-pool.ts

@@ -1,4 +1,5 @@
 import { type ProvingJobSource } from '@aztec/circuit-types';
+import { sleep } from '@aztec/foundation/sleep';
 import { type SimulationProvider } from '@aztec/simulator';
 
 import { mkdtemp } from 'fs/promises';
@@ -33,6 +34,8 @@ export class ProverPool {
 
     for (const agent of this.agents) {
       agent.start(source);
+      // stagger that start of each agent to avoid contention
+      await sleep(10);
     }
   }
 

yarn-project/prover-client/src/tx-prover/tx-prover.ts

@@ -68,9 +68,9 @@ export class TxProver implements ProverClient {
         throw new Error();
       }
 
-      pool = ProverPool.nativePool(config, config.proverAgents, 10);
+      pool = ProverPool.nativePool(config, config.proverAgents, 50);
     } else {
-      pool = ProverPool.testPool(simulationProvider, config.proverAgents, 10);
+      pool = ProverPool.testPool(simulationProvider, config.proverAgents, 50);
     }
 
     const prover = new TxProver(worldStateSynchronizer, getVerificationKeys(), pool);