Measure heap usage while processing the ledger

core/src/banking_stage.rs

@@ -6,7 +6,6 @@ use crate::{
     packet::{limited_deserialize, Packet, Packets, PACKETS_PER_BATCH},
     poh_recorder::{PohRecorder, PohRecorderError, WorkingBankEntry},
     poh_service::PohService,
-    result::{Error, Result},
 };
 use crossbeam_channel::{Receiver as CrossbeamReceiver, RecvTimeoutError};
 use itertools::Itertools;

core/src/replay_stage.rs

@@ -18,8 +18,7 @@ use solana_ledger::{
     leader_schedule_cache::LeaderScheduleCache,
     snapshot_package::SnapshotPackageSender,
 };
-use solana_measure::measure::Measure;
-use solana_measure::thread_mem_usage;
+use solana_measure::{measure::Measure, thread_mem_usage};
 use solana_metrics::inc_new_counter_info;
 use solana_runtime::bank::Bank;
 use solana_sdk::{

core/src/streamer.rs

@@ -3,7 +3,6 @@
 
 use crate::packet::{self, send_to, Packets, PacketsRecycler, PACKETS_PER_BATCH};
 use crate::recvmmsg::NUM_RCVMMSGS;
-use crate::result::{Error, Result};
 use solana_measure::thread_mem_usage;
 use solana_sdk::timing::duration_as_ms;
 use std::net::UdpSocket;