diff --git a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/AbstractSbeModel.java b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/AbstractSbeModel.java
index 29843ebff..dc17b5ec1 100644
--- a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/AbstractSbeModel.java
+++ b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/AbstractSbeModel.java
@@ -5,7 +5,7 @@
 import net.openhft.chronicle.bytes.BytesMarshallable;
 import net.openhft.chronicle.bytes.BytesOut;
 import net.openhft.chronicle.bytes.PointerBytesStore;
-import open.vincentf13.service.spot.infra.alloc.ThreadContext;
+import open.vincentf13.service.spot.infra.alloc.NativeUnsafeBuffer;
 import open.vincentf13.service.spot.sbe.MessageHeaderDecoder;
 import open.vincentf13.service.spot.sbe.MessageHeaderEncoder;
 import org.agrona.DirectBuffer;
@@ -27,6 +27,7 @@ public abstract class AbstractSbeModel implements BytesMarshallable {
     protected final MessageHeaderEncoder headerEncoder = new MessageHeaderEncoder();
     protected final MessageHeaderDecoder headerDecoder = new MessageHeaderDecoder();
     protected final UnsafeBuffer internalBuffer = new UnsafeBuffer(0, 0);
+    protected final NativeUnsafeBuffer encodeBuffer = new NativeUnsafeBuffer(256);
 
     public void setGatewaySeq(long val) { this.seq = val; }
     public long getGatewaySeq() { return this.seq; }
@@ -40,8 +41,8 @@ protected DirectBuffer wrapStore(PointerBytesStore store) {
         return internalBuffer;
     }
 
-    public void fillFromScratch(int length) {
-        fillFrom(ThreadContext.get().getScratchBuffer().buffer(), 0, length);
+    public void fillFromEncodeBuffer(int length) {
+        fillFrom(encodeBuffer.buffer(), 0, length);
     }
 
     public void fillFrom(open.vincentf13.service.spot.infra.alloc.aeron.AbstractAeronAlloc<?> aeron) {
diff --git a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/AuthCommand.java b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/AuthCommand.java
index 1f63e6573..917e388ab 100644
--- a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/AuthCommand.java
+++ b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/AuthCommand.java
@@ -2,7 +2,6 @@
 
 import lombok.Data;
 import lombok.EqualsAndHashCode;
-import open.vincentf13.service.spot.infra.alloc.ThreadContext;
 import open.vincentf13.service.spot.sbe.AuthDecoder;
 import open.vincentf13.service.spot.sbe.AuthEncoder;
 import org.agrona.DirectBuffer;
@@ -24,9 +23,9 @@ public AuthDecoder decode() {
     }
 
     public void encode(long timestamp, long userId) {
-        MutableDirectBuffer buffer = ThreadContext.get().getScratchBuffer().wrapForWrite();
+        MutableDirectBuffer buffer = encodeBuffer.wrapForWrite();
         wrapHeader(buffer, AuthEncoder.TEMPLATE_ID, AuthEncoder.BLOCK_LENGTH, AuthEncoder.SCHEMA_ID, AuthEncoder.SCHEMA_VERSION);
         encoder.wrap(buffer, HEADER_SIZE).timestamp(timestamp).userId(userId);
-        fillFromScratch(HEADER_SIZE + encoder.encodedLength());
+        fillFromEncodeBuffer(HEADER_SIZE + encoder.encodedLength());
     }
 }
diff --git a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/DepositCommand.java b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/DepositCommand.java
index ff6b86cc5..740f0eae6 100644
--- a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/DepositCommand.java
+++ b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/DepositCommand.java
@@ -2,7 +2,6 @@
 
 import lombok.Data;
 import lombok.EqualsAndHashCode;
-import open.vincentf13.service.spot.infra.alloc.ThreadContext;
 import open.vincentf13.service.spot.sbe.DepositDecoder;
 import open.vincentf13.service.spot.sbe.DepositEncoder;
 import org.agrona.DirectBuffer;
@@ -24,9 +23,9 @@ public DepositDecoder decode() {
     }
 
     public void encode(long timestamp, long userId, int assetId, long amount) {
-        MutableDirectBuffer buffer = ThreadContext.get().getScratchBuffer().wrapForWrite();
+        MutableDirectBuffer buffer = encodeBuffer.wrapForWrite();
         wrapHeader(buffer, DepositEncoder.TEMPLATE_ID, DepositEncoder.BLOCK_LENGTH, DepositEncoder.SCHEMA_ID, DepositEncoder.SCHEMA_VERSION);
         encoder.wrap(buffer, HEADER_SIZE).timestamp(timestamp).userId(userId).assetId(assetId).amount(amount);
-        fillFromScratch(HEADER_SIZE + encoder.encodedLength());
+        fillFromEncodeBuffer(HEADER_SIZE + encoder.encodedLength());
     }
 }
diff --git a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderAcceptedReport.java b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderAcceptedReport.java
index afcca0cea..299b07dea 100644
--- a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderAcceptedReport.java
+++ b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderAcceptedReport.java
@@ -3,8 +3,10 @@
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import open.vincentf13.service.spot.sbe.ExecutionReportDecoder;
+import open.vincentf13.service.spot.sbe.ExecutionReportEncoder;
 import open.vincentf13.service.spot.sbe.OrderStatus;
 import org.agrona.DirectBuffer;
+import org.agrona.MutableDirectBuffer;
 
 /**
  * 訂單接受回報
@@ -12,6 +14,7 @@
 @Data
 @EqualsAndHashCode(callSuper = true)
 public class OrderAcceptedReport extends AbstractSbeModel {
+    private final ExecutionReportEncoder encoder = new ExecutionReportEncoder();
     private final ExecutionReportDecoder decoder = new ExecutionReportDecoder();
 
     public ExecutionReportDecoder decode() {
@@ -23,4 +26,11 @@ public ExecutionReportDecoder decode() {
     public void encode(long timestamp, long userId, long orderId, long clientOrderId) {
         encodeReport(timestamp, userId, orderId, OrderStatus.NEW, 0, 0, 0, 0, clientOrderId);
     }
+
+    private void encodeReport(long timestamp, long userId, long orderId, OrderStatus status, long lastPrice, long lastQty, long cumQty, long avgPrice, long clientOrderId) {
+        MutableDirectBuffer buffer = encodeBuffer.wrapForWrite();
+        wrapHeader(buffer, ExecutionReportEncoder.TEMPLATE_ID, ExecutionReportEncoder.BLOCK_LENGTH, ExecutionReportEncoder.SCHEMA_ID, ExecutionReportEncoder.SCHEMA_VERSION);
+        encoder.wrap(buffer, HEADER_SIZE).timestamp(timestamp).userId(userId).orderId(orderId).status(status).lastPrice(lastPrice).lastQty(lastQty).cumQty(cumQty).avgPrice(avgPrice).clientOrderId(clientOrderId);
+        fillFromEncodeBuffer(HEADER_SIZE + encoder.encodedLength());
+    }
 }
diff --git a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCancelCommand.java b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCancelCommand.java
index e0036b674..f1b634abb 100644
--- a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCancelCommand.java
+++ b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCancelCommand.java
@@ -2,7 +2,6 @@
 
 import lombok.Data;
 import lombok.EqualsAndHashCode;
-import open.vincentf13.service.spot.infra.alloc.ThreadContext;
 import open.vincentf13.service.spot.sbe.OrderCancelDecoder;
 import open.vincentf13.service.spot.sbe.OrderCancelEncoder;
 import org.agrona.DirectBuffer;
@@ -24,9 +23,9 @@ public OrderCancelDecoder decode() {
     }
 
     public void encode(long timestamp, long userId, long orderId) {
-        MutableDirectBuffer buffer = ThreadContext.get().getScratchBuffer().wrapForWrite();
+        MutableDirectBuffer buffer = encodeBuffer.wrapForWrite();
         wrapHeader(buffer, OrderCancelEncoder.TEMPLATE_ID, OrderCancelEncoder.BLOCK_LENGTH, OrderCancelEncoder.SCHEMA_ID, OrderCancelEncoder.SCHEMA_VERSION);
         encoder.wrap(buffer, HEADER_SIZE).timestamp(timestamp).userId(userId).orderId(orderId);
-        fillFromScratch(HEADER_SIZE + encoder.encodedLength());
+        fillFromEncodeBuffer(HEADER_SIZE + encoder.encodedLength());
     }
 }
diff --git a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCanceledReport.java b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCanceledReport.java
index 91726dd21..bbf5508ed 100644
--- a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCanceledReport.java
+++ b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCanceledReport.java
@@ -3,8 +3,10 @@
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import open.vincentf13.service.spot.sbe.ExecutionReportDecoder;
+import open.vincentf13.service.spot.sbe.ExecutionReportEncoder;
 import open.vincentf13.service.spot.sbe.OrderStatus;
 import org.agrona.DirectBuffer;
+import org.agrona.MutableDirectBuffer;
 
 /**
  * 訂單撤單回報
@@ -12,6 +14,7 @@
 @Data
 @EqualsAndHashCode(callSuper = true)
 public class OrderCanceledReport extends AbstractSbeModel {
+    private final ExecutionReportEncoder encoder = new ExecutionReportEncoder();
     private final ExecutionReportDecoder decoder = new ExecutionReportDecoder();
 
     public ExecutionReportDecoder decode() {
@@ -23,4 +26,11 @@ public ExecutionReportDecoder decode() {
     public void encode(long timestamp, long userId, long orderId, long filledQuantity, long clientOrderId) {
         encodeReport(timestamp, userId, orderId, OrderStatus.CANCELED, 0, 0, filledQuantity, 0, clientOrderId);
     }
+
+    private void encodeReport(long timestamp, long userId, long orderId, OrderStatus status, long lastPrice, long lastQty, long cumQty, long avgPrice, long clientOrderId) {
+        MutableDirectBuffer buffer = encodeBuffer.wrapForWrite();
+        wrapHeader(buffer, ExecutionReportEncoder.TEMPLATE_ID, ExecutionReportEncoder.BLOCK_LENGTH, ExecutionReportEncoder.SCHEMA_ID, ExecutionReportEncoder.SCHEMA_VERSION);
+        encoder.wrap(buffer, HEADER_SIZE).timestamp(timestamp).userId(userId).orderId(orderId).status(status).lastPrice(lastPrice).lastQty(lastQty).cumQty(cumQty).avgPrice(avgPrice).clientOrderId(clientOrderId);
+        fillFromEncodeBuffer(HEADER_SIZE + encoder.encodedLength());
+    }
 }
diff --git a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCreateCommand.java b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCreateCommand.java
index 453db3b7a..856fcd0ce 100644
--- a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCreateCommand.java
+++ b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderCreateCommand.java
@@ -2,7 +2,6 @@
 
 import lombok.Data;
 import lombok.EqualsAndHashCode;
-import open.vincentf13.service.spot.infra.alloc.ThreadContext;
 import open.vincentf13.service.spot.sbe.OrderCreateDecoder;
 import open.vincentf13.service.spot.sbe.OrderCreateEncoder;
 import open.vincentf13.service.spot.sbe.Side;
@@ -25,9 +24,9 @@ public OrderCreateDecoder decode() {
     }
 
     public void encode(long timestamp, long userId, int symbolId, long price, long qty, Side side, long clientOrderId) {
-        MutableDirectBuffer buffer = ThreadContext.get().getScratchBuffer().wrapForWrite();
+        MutableDirectBuffer buffer = encodeBuffer.wrapForWrite();
         wrapHeader(buffer, OrderCreateEncoder.TEMPLATE_ID, OrderCreateEncoder.BLOCK_LENGTH, OrderCreateEncoder.SCHEMA_ID, OrderCreateEncoder.SCHEMA_VERSION);
         encoder.wrap(buffer, HEADER_SIZE).timestamp(timestamp).userId(userId).symbolId(symbolId).price(price).qty(qty).side(side).clientOrderId(clientOrderId);
-        fillFromScratch(HEADER_SIZE + encoder.encodedLength());
+        fillFromEncodeBuffer(HEADER_SIZE + encoder.encodedLength());
     }
 }
diff --git a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderMatchReport.java b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderMatchReport.java
index d5a29e7f4..f1586f685 100644
--- a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderMatchReport.java
+++ b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderMatchReport.java
@@ -3,8 +3,10 @@
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import open.vincentf13.service.spot.sbe.ExecutionReportDecoder;
+import open.vincentf13.service.spot.sbe.ExecutionReportEncoder;
 import open.vincentf13.service.spot.sbe.OrderStatus;
 import org.agrona.DirectBuffer;
+import org.agrona.MutableDirectBuffer;
 
 /**
  * 訂單成交回報
@@ -12,6 +14,7 @@
 @Data
 @EqualsAndHashCode(callSuper = true)
 public class OrderMatchReport extends AbstractSbeModel {
+    private final ExecutionReportEncoder encoder = new ExecutionReportEncoder();
     private final ExecutionReportDecoder decoder = new ExecutionReportDecoder();
 
     public ExecutionReportDecoder decode() {
@@ -23,4 +26,11 @@ public ExecutionReportDecoder decode() {
     public void encode(long timestamp, long userId, long orderId, OrderStatus status, long lastPrice, long lastQty, long cumQty, long avgPrice, long clientOrderId) {
         encodeReport(timestamp, userId, orderId, status, lastPrice, lastQty, cumQty, avgPrice, clientOrderId);
     }
+
+    private void encodeReport(long timestamp, long userId, long orderId, OrderStatus status, long lastPrice, long lastQty, long cumQty, long avgPrice, long clientOrderId) {
+        MutableDirectBuffer buffer = encodeBuffer.wrapForWrite();
+        wrapHeader(buffer, ExecutionReportEncoder.TEMPLATE_ID, ExecutionReportEncoder.BLOCK_LENGTH, ExecutionReportEncoder.SCHEMA_ID, ExecutionReportEncoder.SCHEMA_VERSION);
+        encoder.wrap(buffer, HEADER_SIZE).timestamp(timestamp).userId(userId).orderId(orderId).status(status).lastPrice(lastPrice).lastQty(lastQty).cumQty(cumQty).avgPrice(avgPrice).clientOrderId(clientOrderId);
+        fillFromEncodeBuffer(HEADER_SIZE + encoder.encodedLength());
+    }
 }
diff --git a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderRejectedReport.java b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderRejectedReport.java
index 6ca983b8e..ef28f1a28 100644
--- a/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderRejectedReport.java
+++ b/service/spot-exchange/spot-infra/src/main/java/open/vincentf13/service/spot/model/command/OrderRejectedReport.java
@@ -3,8 +3,10 @@
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import open.vincentf13.service.spot.sbe.ExecutionReportDecoder;
+import open.vincentf13.service.spot.sbe.ExecutionReportEncoder;
 import open.vincentf13.service.spot.sbe.OrderStatus;
 import org.agrona.DirectBuffer;
+import org.agrona.MutableDirectBuffer;
 
 /**
  * 訂單拒絕回報
@@ -12,6 +14,7 @@
 @Data
 @EqualsAndHashCode(callSuper = true)
 public class OrderRejectedReport extends AbstractSbeModel {
+    private final ExecutionReportEncoder encoder = new ExecutionReportEncoder();
     private final ExecutionReportDecoder decoder = new ExecutionReportDecoder();
 
     public ExecutionReportDecoder decode() {
@@ -23,4 +26,11 @@ public ExecutionReportDecoder decode() {
     public void encode(long timestamp, long userId, long clientOrderId) {
         encodeReport(timestamp, userId, 0, OrderStatus.REJECTED, 0, 0, 0, 0, clientOrderId);
     }
+
+    private void encodeReport(long timestamp, long userId, long orderId, OrderStatus status, long lastPrice, long lastQty, long cumQty, long avgPrice, long clientOrderId) {
+        MutableDirectBuffer buffer = encodeBuffer.wrapForWrite();
+        wrapHeader(buffer, ExecutionReportEncoder.TEMPLATE_ID, ExecutionReportEncoder.BLOCK_LENGTH, ExecutionReportEncoder.SCHEMA_ID, ExecutionReportEncoder.SCHEMA_VERSION);
+        encoder.wrap(buffer, HEADER_SIZE).timestamp(timestamp).userId(userId).orderId(orderId).status(status).lastPrice(lastPrice).lastQty(lastQty).cumQty(cumQty).avgPrice(avgPrice).clientOrderId(clientOrderId);
+        fillFromEncodeBuffer(HEADER_SIZE + encoder.encodedLength());
+    }
 }