diff --git a/protobuf/lib/src/protobuf/coded_buffer_reader.dart b/protobuf/lib/src/protobuf/coded_buffer_reader.dart
index 3c2165c..cc7e3dd 100644
--- a/protobuf/lib/src/protobuf/coded_buffer_reader.dart
+++ b/protobuf/lib/src/protobuf/coded_buffer_reader.dart
@@ -13,6 +13,11 @@
   static const int DEFAULT_SIZE_LIMIT = 64 << 20;
 
   final Uint8List _buffer;
+
+  /// [ByteData] of [_buffer], created once to be able to decode fixed-size
+  /// integers and floats without having to allocate a [ByteData] every time.
+  late final ByteData _byteData = ByteData.sublistView(_buffer);
+
   int _bufferPos = 0;
   int _currentLimit = -1;
   int _lastTag = 0;
@@ -123,9 +128,20 @@
   Int64 readUint64() => _readRawVarint64();
   int readSint32() => _decodeZigZag32(readUint32());
   Int64 readSint64() => _decodeZigZag64(readUint64());
-  int readFixed32() => _readByteData(4).getUint32(0, Endian.little);
+
+  int readFixed32() {
+    final pos = _bufferPos;
+    _checkLimit(4);
+    return _byteData.getUint32(pos, Endian.little);
+  }
+
   Int64 readFixed64() => readSfixed64();
-  int readSfixed32() => _readByteData(4).getInt32(0, Endian.little);
+
+  int readSfixed32() {
+    final pos = _bufferPos;
+    _checkLimit(4);
+    return _byteData.getInt32(pos, Endian.little);
+  }
 
   Int64 readSfixed64() {
     final pos = _bufferPos;
@@ -158,8 +174,17 @@
         .convert(_buffer, stringPos, stringPos + length);
   }
 
-  double readFloat() => _readByteData(4).getFloat32(0, Endian.little);
-  double readDouble() => _readByteData(8).getFloat64(0, Endian.little);
+  double readFloat() {
+    final pos = _bufferPos;
+    _checkLimit(4);
+    return _byteData.getFloat32(pos, Endian.little);
+  }
+
+  double readDouble() {
+    final pos = _bufferPos;
+    _checkLimit(8);
+    return _byteData.getFloat64(pos, Endian.little);
+  }
 
   int readTag() {
     if (isAtEnd()) {
@@ -270,10 +295,4 @@
     }
     throw InvalidProtocolBufferException.malformedVarint();
   }
-
-  ByteData _readByteData(int sizeInBytes) {
-    _checkLimit(sizeInBytes);
-    return ByteData.view(_buffer.buffer,
-        _buffer.offsetInBytes + _bufferPos - sizeInBytes, sizeInBytes);
-  }
 }