diff --git a/.gitignore b/.gitignore
index 1c2a5aa..a9c3115 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ config.py
 *.o
 miner
 launcher
+*.conf
diff --git a/Makefile b/Makefile
index 6046046..1d33a57 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CC := gcc
-CFLAGS := -O3 -Wall -Wextra -std=c11 -D_GNU_SOURCE -D_POSIX_C_SOURCE=200809L
-LDFLAGS := -pthread -lcrypto -lm
+CFLAGS := -O3 -march=native -mtune=native -flto -fomit-frame-pointer -DNDEBUG -Wall -Wextra -std=c11 -D_GNU_SOURCE -D_POSIX_C_SOURCE=200809L
+LDFLAGS := -pthread -lcrypto -lm -flto
 
 COMMON_OBJS := config.o utils.o json.o rpc.o types.o block_builder.o miner.o mining_loop.o
 
diff --git a/miner.conf.example b/miner.conf.example
index 64bda2e..4c6a04e 100644
--- a/miner.conf.example
+++ b/miner.conf.example
@@ -10,8 +10,8 @@ WALLET_ADDRESS=bcrt1qn9ewln06n3xmc64278nj8m4nyde7ddeuvsvhw6
 # Mining
 DIFFICULTY_FACTOR=0.01
 NONCE_MODE=incremental   # incremental | random | mixed
-TIMESTAMP_UPDATE_INTERVAL=30
-BATCH=10000
+TIMESTAMP_UPDATE_INTERVAL=120
+BATCH=200000
 COINBASE_MESSAGE=/c-miner/
 EXTRANONCE1=1234567890abcdef
 EXTRANONCE2=12341234
@@ -20,4 +20,4 @@ EXTRANONCE2=12341234
 NUM_PROCESSORS=0         # <=0 uses CPU count
 
 # Watchdog
-CHECK_INTERVAL=20
+CHECK_INTERVAL=120