lib: use slice to compact Readable buffer

Author: wlgh1553

lib/internal/streams/readable.js

@@ -23,6 +23,7 @@
 
 const {
   ArrayPrototypeIndexOf,
+  ArrayPrototypeSlice,
   NumberIsInteger,
   NumberIsNaN,
   NumberParseInt,
@@ -1673,7 +1674,7 @@ function fromList(n, state) {
     state.buffer.length = 0;
     state.bufferIndex = 0;
   } else if (idx > 1024) {
-    state.buffer.splice(0, idx);
+    state.buffer = ArrayPrototypeSlice(state.buffer, idx);
     state.bufferIndex = 0;
   } else {
     state.bufferIndex = idx;