diff --git a/cassandra/buffer.pxd b/cassandra/buffer.pxd
index 0bbb1d5f57..7711546f34 100644
--- a/cassandra/buffer.pxd
+++ b/cassandra/buffer.pxd
@@ -41,18 +41,13 @@ cdef inline char *buf_read(Buffer *buf, Py_ssize_t size) except NULL:
         raise IndexError("Requested more than length of buffer")
     return buf.ptr
 
-cdef inline int slice_buffer(Buffer *buf, Buffer *out,
-                             Py_ssize_t start, Py_ssize_t size) except -1:
-    if size < 0:
-        raise ValueError("Length must be positive")
+cdef inline void from_ptr_and_size(char *ptr, Py_ssize_t size, Buffer *buf):
+    """Initialize buf from ptr and size.
 
-    if start + size > buf.size:
-        raise IndexError("Buffer slice out of bounds")
+    Negative sizes are valid sentinel values: -1 means NULL, -2 means not-set.
+    Callers should check buf.size < 0 to detect these cases.
+    """
+    buf.ptr = ptr
+    buf.size = size
 
-    out.ptr = buf.ptr + start
-    out.size = size
-    return 0
 
-cdef inline void from_ptr_and_size(char *ptr, Py_ssize_t size, Buffer *out):
-    out.ptr = ptr
-    out.size = size
diff --git a/cassandra/cython_marshal.pyx b/cassandra/cython_marshal.pyx
index 0a926b6eef..ac07b6378f 100644
--- a/cassandra/cython_marshal.pyx
+++ b/cassandra/cython_marshal.pyx
@@ -19,6 +19,19 @@ from libc.stdint cimport (int8_t, int16_t, int32_t, int64_t,
 from libc.string cimport memcpy
 from cassandra.buffer cimport Buffer, buf_read, to_bytes
 
+# Use ntohs/ntohl for efficient big-endian to native conversion (single bswap instruction on x86)
+# Platform-specific header: arpa/inet.h on POSIX, winsock2.h on Windows
+cdef extern from *:
+    """
+    #ifdef _WIN32
+        #include <winsock2.h>
+    #else
+        #include <arpa/inet.h>
+    #endif
+    """
+    uint16_t ntohs(uint16_t netshort) nogil
+    uint32_t ntohl(uint32_t netlong) nogil
+
 cdef bint is_little_endian
 from cassandra.util import is_little_endian
 
@@ -36,35 +49,40 @@ ctypedef fused num_t:
 
 cdef inline num_t unpack_num(Buffer *buf, num_t *dummy=NULL): # dummy pointer because cython wants the fused type as an arg
     """
-    Copy to aligned destination, conditionally swapping to native byte order
+    Copy to aligned destination, conditionally swapping to native byte order.
+    Uses ntohs/ntohl for 16/32-bit types (compiles to single bswap instruction).
     """
-    cdef Py_ssize_t start, end, i
+    cdef Py_ssize_t i
     cdef char *src = buf_read(buf, sizeof(num_t))
-    cdef num_t ret = 0
+    cdef num_t ret
     cdef char *out = <char*> &ret
+    cdef uint32_t temp32  # For float byte-swapping
+
+    # Copy to aligned location first
+    memcpy(&ret, src, sizeof(num_t))
+
+    if not is_little_endian:
+        return ret
 
-    if is_little_endian:
+    # Use optimized byte-swap intrinsics for 16-bit and 32-bit types
+    if num_t is int16_t or num_t is uint16_t:
+        return <num_t>ntohs(<uint16_t>ret)
+    elif num_t is int32_t or num_t is uint32_t:
+        return <num_t>ntohl(<uint32_t>ret)
+    elif num_t is float:
+        # For float, reinterpret bits as uint32, swap, then reinterpret back
+        temp32 = (<uint32_t*>&ret)[0]
+        temp32 = ntohl(temp32)
+        return (<float*>&temp32)[0]
+    else:
+        # 64-bit, double, or 8-bit: use byte-swap loop (8-bit loop is no-op)
         for i in range(sizeof(num_t)):
             out[sizeof(num_t) - i - 1] = src[i]
-    else:
-        memcpy(out, src, sizeof(num_t))
-
-    return ret
+        return ret
 
 cdef varint_unpack(Buffer *term):
     """Unpack a variable-sized integer"""
     return varint_unpack_py3(to_bytes(term))
 
-# TODO: Optimize these two functions
 cdef varint_unpack_py3(bytes term):
-    val = int(''.join(["%02x" % i for i in term]), 16)
-    if (term[0] & 128) != 0:
-        shift = len(term) * 8  # * Note below
-        val -= 1 << shift
-    return val
-
-# * Note *
-# '1 << (len(term) * 8)' Cython tries to do native
-# integer shifts, which overflows. We need this to
-# emulate Python shifting, which will expand the long
-# to accommodate
+    return int.from_bytes(term, byteorder='big', signed=True)
diff --git a/cassandra/deserializers.pyx b/cassandra/deserializers.pyx
index 98e8676bbc..8db1612339 100644
--- a/cassandra/deserializers.pyx
+++ b/cassandra/deserializers.pyx
@@ -13,10 +13,11 @@
 # limitations under the License.
 
 
-from libc.stdint cimport int32_t, uint16_t
+from libc.stdint cimport int32_t, int64_t, int16_t, uint16_t, uint32_t
+from libc.string cimport memcpy
 
 include 'cython_marshal.pyx'
-from cassandra.buffer cimport Buffer, to_bytes, slice_buffer
+from cassandra.buffer cimport Buffer, to_bytes, from_ptr_and_size
 from cassandra.cython_utils cimport datetime_from_timestamp, datetime_from_ms_timestamp
 
 from cython.view cimport array as cython_array
@@ -29,6 +30,11 @@ from uuid import UUID
 from cassandra import cqltypes
 from cassandra import util
 
+# Import numpy availability flag and conditionally import numpy
+from cassandra.cython_deps import HAVE_NUMPY
+if HAVE_NUMPY:
+    import numpy as np
+
 cdef class Deserializer:
     """Cython-based deserializer class for a cqltype"""
 
@@ -58,10 +64,11 @@ cdef class DesBytesTypeByteArray(Deserializer):
 # TODO: Use libmpdec: http://www.bytereef.org/mpdecimal/index.html
 cdef class DesDecimalType(Deserializer):
     cdef deserialize(self, Buffer *buf, int protocol_version):
-        cdef Buffer varint_buf
-        slice_buffer(buf, &varint_buf, 4, buf.size - 4)
-
         cdef int32_t scale = unpack_num[int32_t](buf)
+
+        # Create a view of the remaining bytes (after the 4-byte scale)
+        cdef Buffer varint_buf
+        from_ptr_and_size(buf.ptr + 4, buf.size - 4, &varint_buf)
         unscaled = varint_unpack(&varint_buf)
 
         return Decimal('%de%d' % (unscaled, -scale))
@@ -181,8 +188,240 @@ cdef class DesVarcharType(DesUTF8Type):
     pass
 
 
+#--------------------------------------------------------------------------
+# Vector deserialization
+
+cdef inline bint _is_float_type(object subtype):
+    return subtype is cqltypes.FloatType or issubclass(subtype, cqltypes.FloatType)
+
+cdef inline bint _is_double_type(object subtype):
+    return subtype is cqltypes.DoubleType or issubclass(subtype, cqltypes.DoubleType)
+
+cdef inline bint _is_int32_type(object subtype):
+    return subtype is cqltypes.Int32Type or issubclass(subtype, cqltypes.Int32Type)
+
+cdef inline bint _is_int64_type(object subtype):
+    return subtype is cqltypes.LongType or issubclass(subtype, cqltypes.LongType)
+
+cdef inline bint _is_int16_type(object subtype):
+    return subtype is cqltypes.ShortType or issubclass(subtype, cqltypes.ShortType)
+
+cdef inline list _deserialize_numpy_vector(Buffer *buf, int vector_size, str dtype):
+    """Unified numpy deserialization for large vectors"""
+    return np.frombuffer(buf.ptr[:buf.size], dtype=dtype, count=vector_size).tolist()
+
+cdef class DesVectorType(Deserializer):
+    """
+    Optimized Cython deserializer for VectorType.
+
+    For float and double vectors, uses direct memory access with C-level casting
+    for significantly better performance than Python-level deserialization.
+    """
+
+    cdef int vector_size
+    cdef object subtype
+
+    def __init__(self, cqltype):
+        super().__init__(cqltype)
+        self.vector_size = cqltype.vector_size
+        self.subtype = cqltype.subtype
+
+    def deserialize_bytes(self, bytes data, int protocol_version):
+        """Python-callable wrapper for deserialize that takes bytes."""
+        cdef Buffer buf
+        buf.ptr = <char*>data
+        buf.size = len(data)
+        return self.deserialize(&buf, protocol_version)
+
+    cdef deserialize(self, Buffer *buf, int protocol_version):
+        cdef int expected_size
+        cdef int elem_size
+        cdef bint use_numpy = HAVE_NUMPY and self.vector_size >= 32
+
+        # Determine element type, size, and dispatch appropriately
+        if _is_float_type(self.subtype):
+            elem_size = 4
+            expected_size = self.vector_size * elem_size
+            if buf.size == expected_size:
+                if use_numpy:
+                    return _deserialize_numpy_vector(buf, self.vector_size, '>f4')
+                return self._deserialize_float(buf)
+            raise ValueError(
+                f"Expected vector of type {self.subtype.typename} and dimension {self.vector_size} "
+                f"to have serialized size {expected_size}; observed serialized size of {buf.size} instead")
+        elif _is_double_type(self.subtype):
+            elem_size = 8
+            expected_size = self.vector_size * elem_size
+            if buf.size == expected_size:
+                if use_numpy:
+                    return _deserialize_numpy_vector(buf, self.vector_size, '>f8')
+                return self._deserialize_double(buf)
+            raise ValueError(
+                f"Expected vector of type {self.subtype.typename} and dimension {self.vector_size} "
+                f"to have serialized size {expected_size}; observed serialized size of {buf.size} instead")
+        elif _is_int32_type(self.subtype):
+            elem_size = 4
+            expected_size = self.vector_size * elem_size
+            if buf.size == expected_size:
+                if use_numpy:
+                    return _deserialize_numpy_vector(buf, self.vector_size, '>i4')
+                return self._deserialize_int32(buf)
+            raise ValueError(
+                f"Expected vector of type {self.subtype.typename} and dimension {self.vector_size} "
+                f"to have serialized size {expected_size}; observed serialized size of {buf.size} instead")
+        elif _is_int64_type(self.subtype):
+            elem_size = 8
+            expected_size = self.vector_size * elem_size
+            if buf.size == expected_size:
+                if use_numpy:
+                    return _deserialize_numpy_vector(buf, self.vector_size, '>i8')
+                return self._deserialize_int64(buf)
+            raise ValueError(
+                f"Expected vector of type {self.subtype.typename} and dimension {self.vector_size} "
+                f"to have serialized size {expected_size}; observed serialized size of {buf.size} instead")
+        elif _is_int16_type(self.subtype):
+            elem_size = 2
+            expected_size = self.vector_size * elem_size
+            if buf.size == expected_size:
+                if use_numpy:
+                    return _deserialize_numpy_vector(buf, self.vector_size, '>i2')
+                return self._deserialize_int16(buf)
+            raise ValueError(
+                f"Expected vector of type {self.subtype.typename} and dimension {self.vector_size} "
+                f"to have serialized size {expected_size}; observed serialized size of {buf.size} instead")
+        else:
+            # Unsupported type, use generic deserialization
+            return self._deserialize_generic(buf, protocol_version)
+
+    cdef inline list _deserialize_float(self, Buffer *buf):
+        """Deserialize float vector using direct C-level access with byte swapping"""
+        cdef Py_ssize_t i
+        cdef list result
+        cdef float temp
+        cdef uint32_t temp32
+
+        result = [None] * self.vector_size
+        for i in range(self.vector_size):
+            # Copy to aligned local, then convert from big-endian
+            memcpy(&temp32, buf.ptr + i * 4, 4)
+            temp32 = ntohl(temp32)
+            temp = (<float*>&temp32)[0]
+            result[i] = temp
+
+        return result
+
+    cdef inline list _deserialize_double(self, Buffer *buf):
+        """Deserialize double vector using direct C-level access with byte swapping"""
+        cdef Py_ssize_t i
+        cdef list result
+        cdef double temp
+        cdef char *src_bytes
+        cdef char *out_bytes
+        cdef int j
+
+        result = [None] * self.vector_size
+        for i in range(self.vector_size):
+            src_bytes = buf.ptr + i * 8
+            out_bytes = <char*>&temp
+
+            # Swap bytes for big-endian to native conversion
+            if is_little_endian:
+                for j in range(8):
+                    out_bytes[7 - j] = src_bytes[j]
+            else:
+                memcpy(&temp, src_bytes, 8)
+
+            result[i] = temp
+
+        return result
+
+    cdef inline list _deserialize_int32(self, Buffer *buf):
+        """Deserialize int32 vector using direct C-level access with ntohl"""
+        cdef Py_ssize_t i
+        cdef list result
+        cdef int32_t temp
+        cdef uint32_t temp32
+
+        result = [None] * self.vector_size
+        for i in range(self.vector_size):
+            # Copy to aligned local, then convert from big-endian
+            memcpy(&temp32, buf.ptr + i * 4, 4)
+            temp = <int32_t>ntohl(temp32)
+            result[i] = temp
+
+        return result
+
+    cdef inline list _deserialize_int64(self, Buffer *buf):
+        """Deserialize int64/long vector using direct C-level access with byte swapping"""
+        cdef Py_ssize_t i
+        cdef list result
+        cdef int64_t temp
+        cdef char *src_bytes
+        cdef char *out_bytes
+        cdef int j
+
+        result = [None] * self.vector_size
+        for i in range(self.vector_size):
+            src_bytes = buf.ptr + i * 8
+            out_bytes = <char*>&temp
+
+            # Swap bytes for big-endian to native conversion
+            if is_little_endian:
+                for j in range(8):
+                    out_bytes[7 - j] = src_bytes[j]
+            else:
+                memcpy(&temp, src_bytes, 8)
+
+            result[i] = temp
+
+        return result
+
+    cdef inline list _deserialize_int16(self, Buffer *buf):
+        """Deserialize int16/short vector using direct C-level access with ntohs"""
+        cdef Py_ssize_t i
+        cdef list result
+        cdef int16_t temp
+
+        result = [None] * self.vector_size
+        for i in range(self.vector_size):
+            temp = <int16_t>ntohs((<uint16_t*>(buf.ptr + i * 2))[0])
+            result[i] = temp
+
+        return result
+
+    cdef inline list _deserialize_generic(self, Buffer *buf, int protocol_version):
+        """Fallback: element-by-element deserialization for non-optimized types"""
+        cdef Py_ssize_t i
+        cdef Buffer elem_buf
+        cdef int offset = 0
+        cdef list result = [None] * self.vector_size
+
+        _serialized_size = self.subtype.serial_size()
+        if _serialized_size is None:
+            raise ValueError(
+                f"VectorType with variable-size subtype {self.subtype.typename} "
+                "is not supported in Cython deserializer")
+        cdef int serialized_size = <int>_serialized_size
+
+        # Validate total size before processing
+        cdef int expected_size = self.vector_size * serialized_size
+        if buf.size != expected_size:
+            raise ValueError(
+                f"Expected vector of type {self.subtype.typename} and dimension {self.vector_size} "
+                f"to have serialized size {expected_size}; observed serialized size of {buf.size} instead")
+
+        for i in range(self.vector_size):
+            from_ptr_and_size(buf.ptr + offset, serialized_size, &elem_buf)
+            result[i] = self.subtype.deserialize(to_bytes(&elem_buf), protocol_version)
+            offset += serialized_size
+
+        return result
+
+
+
 cdef class _DesParameterizedType(Deserializer):
 
+
     cdef object subtypes
     cdef Deserializer[::1] deserializers
     cdef Py_ssize_t subtypes_len
@@ -247,22 +486,40 @@ cdef inline int subelem(
     Read the next element from the buffer: first read the size (in bytes) of the
     element, then fill elem_buf with a newly sliced buffer of this size (and the
     right offset).
+
+    Protocol: n >= 0: n bytes follow
+              n == -1: NULL value
+              n == -2: not set value
+              n < -2: invalid
     """
     cdef int32_t elemlen
 
     _unpack_len(buf, offset[0], &elemlen)
     offset[0] += sizeof(int32_t)
-    slice_buffer(buf, elem_buf, offset[0], elemlen)
-    offset[0] += elemlen
-    return 0
-
 
-cdef int _unpack_len(Buffer *buf, int offset, int32_t *output) except -1:
-    cdef Buffer itemlen_buf
-    slice_buffer(buf, &itemlen_buf, offset, sizeof(int32_t))
+    # Happy path: non-negative length element that fits in buffer
+    if elemlen >= 0:
+        if offset[0] + elemlen <= buf.size:
+            from_ptr_and_size(buf.ptr + offset[0], elemlen, elem_buf)
+            offset[0] += elemlen
+            return 0
+        raise IndexError("Element length %d at offset %d exceeds buffer size %d" % (elemlen, offset[0], buf.size))
+    # NULL value (-1) or not set value (-2)
+    elif elemlen == -1 or elemlen == -2:
+        from_ptr_and_size(NULL, elemlen, elem_buf)
+        return 0
+    # Invalid value (n < -2)
+    else:
+        raise ValueError("Invalid element length %d at offset %d" % (elemlen, offset[0]))
 
-    output[0] = unpack_num[int32_t](&itemlen_buf)
 
+cdef inline int _unpack_len(Buffer *buf, int offset, int32_t *output) except -1:
+    """Read a big-endian int32 at the given offset using memcpy for alignment safety."""
+    if offset + sizeof(int32_t) > buf.size:
+        raise IndexError("Cannot read length field: offset %d + 4 exceeds buffer size %d" % (offset, buf.size))
+    cdef uint32_t temp
+    memcpy(&temp, buf.ptr + offset, sizeof(uint32_t))
+    output[0] = <int32_t>ntohl(temp)
     return 0
 
 #--------------------------------------------------------------------------
@@ -320,9 +577,9 @@ cdef class DesTupleType(_DesParameterizedType):
     cdef deserialize(self, Buffer *buf, int protocol_version):
         cdef Py_ssize_t i, p
         cdef int32_t itemlen
+        cdef uint32_t _tuple_tmp
         cdef tuple res = tuple_new(self.subtypes_len)
         cdef Buffer item_buf
-        cdef Buffer itemlen_buf
         cdef Deserializer deserializer
 
         # collections inside UDTs are always encoded with at least the
@@ -330,19 +587,27 @@ cdef class DesTupleType(_DesParameterizedType):
         protocol_version = max(3, protocol_version)
 
         p = 0
-        values = []
         for i in range(self.subtypes_len):
             item = None
-            if p < buf.size:
-                slice_buffer(buf, &itemlen_buf, p, 4)
-                itemlen = unpack_num[int32_t](&itemlen_buf)
+            if p + 4 <= buf.size:
+                # Read itemlen using memcpy for alignment safety
+                memcpy(&_tuple_tmp, buf.ptr + p, 4)
+                itemlen = <int32_t>ntohl(_tuple_tmp)
                 p += 4
-                if itemlen >= 0:
-                    slice_buffer(buf, &item_buf, p, itemlen)
+
+                if itemlen >= 0 and p + itemlen <= buf.size:
+                    from_ptr_and_size(buf.ptr + p, itemlen, &item_buf)
                     p += itemlen
 
                     deserializer = self.deserializers[i]
                     item = from_binary(deserializer, &item_buf, protocol_version)
+                elif itemlen < 0:
+                    # NULL value, item stays None
+                    pass
+                else:
+                    raise IndexError("Tuple item length %d at offset %d exceeds buffer size %d" % (itemlen, p, buf.size))
+            elif p < buf.size:
+                raise IndexError("Cannot read tuple item length at offset %d: only %d bytes remain" % (p, buf.size - p))
 
             tuple_set(res, i, item)
 
@@ -384,15 +649,23 @@ cdef class DesCompositeType(_DesParameterizedType):
                 break
 
             element_length = unpack_num[uint16_t](buf)
-            slice_buffer(buf, &elem_buf, 2, element_length)
 
-            deserializer = self.deserializers[i]
-            item = from_binary(deserializer, &elem_buf, protocol_version)
-            tuple_set(res, i, item)
+            # Validate that we have enough data for the element and EOC byte (happy path check)
+            if 2 + element_length + 1 <= buf.size:
+                from_ptr_and_size(buf.ptr + 2, element_length, &elem_buf)
+
+                deserializer = self.deserializers[i]
+                item = from_binary(deserializer, &elem_buf, protocol_version)
+                tuple_set(res, i, item)
 
-            # skip element length, element, and the EOC (one byte)
-            start = 2 + element_length + 1
-            slice_buffer(buf, buf, start, buf.size - start)
+                # skip element length, element, and the EOC (one byte)
+                # Advance buffer in-place with direct assignment
+                start = 2 + element_length + 1
+                buf.ptr = buf.ptr + start
+                buf.size = buf.size - start
+            else:
+                raise IndexError("Composite element length %d requires %d bytes but only %d remain" %
+                                (element_length, 2 + element_length + 1, buf.size))
 
         return res
 
@@ -474,6 +747,8 @@ cpdef Deserializer find_deserializer(cqltype):
         cls = DesReversedType
     elif issubclass(cqltype, cqltypes.FrozenType):
         cls = DesFrozenType
+    elif issubclass(cqltype, cqltypes.VectorType):
+        cls = DesVectorType
     else:
         cls = GenericDeserializer
 
diff --git a/cassandra/ioutils.pyx b/cassandra/ioutils.pyx
index b0ab4f16cb..f1e489c7cf 100644
--- a/cassandra/ioutils.pyx
+++ b/cassandra/ioutils.pyx
@@ -15,7 +15,8 @@
 include 'cython_marshal.pyx'
 from cassandra.buffer cimport Buffer, from_ptr_and_size
 
-from libc.stdint cimport int32_t
+from libc.stdint cimport int32_t, uint32_t
+from libc.string cimport memcpy
 from cassandra.bytesio cimport BytesIOReader
 
 
@@ -41,7 +42,8 @@ cdef inline int get_buf(BytesIOReader reader, Buffer *buf_out) except -1:
     return 0
 
 cdef inline int32_t read_int(BytesIOReader reader) except ?0xDEAD:
-    cdef Buffer buf
-    buf.ptr = reader.read(4)
-    buf.size = 4
-    return unpack_num[int32_t](&buf)
+    """Read a big-endian int32 directly from the reader using memcpy for alignment safety."""
+    cdef char *src = reader.read(4)
+    cdef uint32_t temp
+    memcpy(&temp, src, 4)
+    return <int32_t>ntohl(temp)
diff --git a/cassandra/marshal.py b/cassandra/marshal.py
index 413e1831d4..a7238ea4b7 100644
--- a/cassandra/marshal.py
+++ b/cassandra/marshal.py
@@ -40,11 +40,7 @@ def _make_packer(format_string):
 
 
 def varint_unpack(term):
-    val = int(''.join("%02x" % i for i in term), 16)
-    if (term[0] & 128) != 0:
-        len_term = len(term)  # pulling this out of the expression to avoid overflow in cython optimized code
-        val -= 1 << (len_term * 8)
-    return val
+    return int.from_bytes(term, byteorder='big', signed=True)
 
 
 def bit_length(n):
diff --git a/tests/unit/test_types.py b/tests/unit/test_types.py
index 11aab2748d..d6af90e227 100644
--- a/tests/unit/test_types.py
+++ b/tests/unit/test_types.py
@@ -525,6 +525,75 @@ def test_deserialization_variable_size_too_big(self):
         with pytest.raises(ValueError, match="Additional bytes remaining after vector deserialization completed"):
             ctype_four.deserialize(ctype_five_bytes, 0)
 
+    def test_vector_cython_deserializer(self):
+        """
+        Test that VectorType uses the Cython DesVectorType deserializer
+        and correctly deserializes vectors of supported numeric types.
+
+        @since 3.x
+        @expected_result Cython deserializer exists and correctly deserializes vector data
+
+        @test_category data_types:vector
+        """
+        import struct
+        try:
+            from cassandra.deserializers import find_deserializer
+        except ImportError:
+            self.skipTest("Cython deserializers not available")
+
+        # Test float vector
+        vt_float = VectorType.apply_parameters(['FloatType', 4], {})
+        des_float = find_deserializer(vt_float)
+        self.assertEqual(des_float.__class__.__name__, 'DesVectorType')
+
+        data_float = struct.pack('>4f', 1.0, 2.0, 3.0, 4.0)
+        result_float = vt_float.deserialize(data_float, 5)
+        self.assertEqual(result_float, [1.0, 2.0, 3.0, 4.0])
+
+        # Test double vector
+        from cassandra.cqltypes import DoubleType
+        vt_double = VectorType.apply_parameters(['DoubleType', 3], {})
+        des_double = find_deserializer(vt_double)
+        self.assertEqual(des_double.__class__.__name__, 'DesVectorType')
+
+        data_double = struct.pack('>3d', 1.5, 2.5, 3.5)
+        result_double = vt_double.deserialize(data_double, 5)
+        self.assertEqual(result_double, [1.5, 2.5, 3.5])
+
+        # Test int32 vector
+        vt_int32 = VectorType.apply_parameters(['Int32Type', 4], {})
+        des_int32 = find_deserializer(vt_int32)
+        self.assertEqual(des_int32.__class__.__name__, 'DesVectorType')
+
+        data_int32 = struct.pack('>4i', 1, 2, 3, 4)
+        result_int32 = vt_int32.deserialize(data_int32, 5)
+        self.assertEqual(result_int32, [1, 2, 3, 4])
+
+        # Test int64/long vector
+        vt_int64 = VectorType.apply_parameters(['LongType', 2], {})
+        des_int64 = find_deserializer(vt_int64)
+        self.assertEqual(des_int64.__class__.__name__, 'DesVectorType')
+
+        data_int64 = struct.pack('>2q', 100, 200)
+        result_int64 = vt_int64.deserialize(data_int64, 5)
+        self.assertEqual(result_int64, [100, 200])
+
+        # Test int16/short vector
+        from cassandra.cqltypes import ShortType
+        vt_int16 = VectorType.apply_parameters(['ShortType', 3], {})
+        des_int16 = find_deserializer(vt_int16)
+        self.assertEqual(des_int16.__class__.__name__, 'DesVectorType')
+
+        data_int16 = struct.pack('>3h', 10, 20, 30)
+        result_int16 = des_int16.deserialize_bytes(data_int16, 5)
+        self.assertEqual(result_int16, [10, 20, 30])
+
+        # Test error handling: wrong buffer size
+        with self.assertRaises(ValueError) as cm:
+            vt_float.deserialize(struct.pack('>3f', 1.0, 2.0, 3.0), 5)  # 3 floats instead of 4
+        self.assertIn('Expected vector', str(cm.exception))
+        self.assertIn('serialized size', str(cm.exception))
+
 
 ZERO = datetime.timedelta(0)