diff --git a/actix-http/Cargo.toml b/actix-http/Cargo.toml
index fe9b62d1..528ab617 100644
--- a/actix-http/Cargo.toml
+++ b/actix-http/Cargo.toml
@@ -59,6 +59,7 @@ base64 = "0.10"
 bitflags = "1.0"
 bytes = "0.4"
 byteorder = "1.2"
+copyless = "0.1.2"
 derive_more = "0.14"
 either = "1.5.2"
 encoding = "0.2"
diff --git a/actix-http/src/h1/payload.rs b/actix-http/src/h1/payload.rs
index e880d46a..28acb64b 100644
--- a/actix-http/src/h1/payload.rs
+++ b/actix-http/src/h1/payload.rs
@@ -77,14 +77,6 @@ impl Payload {
     pub fn unread_data(&mut self, data: Bytes) {
         self.inner.borrow_mut().unread_data(data);
     }
-
-    #[inline]
-    /// Set read buffer capacity
-    ///
-    /// Default buffer capacity is 32Kb.
-    pub fn set_read_buffer_capacity(&mut self, cap: usize) {
-        self.inner.borrow_mut().capacity = cap;
-    }
 }
 
 impl Stream for Payload {
@@ -153,7 +145,6 @@ struct Inner {
     err: Option<PayloadError>,
     need_read: bool,
     items: VecDeque<Bytes>,
-    capacity: usize,
     task: Option<Task>,
     io_task: Option<Task>,
 }
@@ -166,7 +157,6 @@ impl Inner {
             err: None,
             items: VecDeque::new(),
             need_read: true,
-            capacity: MAX_BUFFER_SIZE,
             task: None,
             io_task: None,
         }
@@ -186,7 +176,7 @@ impl Inner {
     fn feed_data(&mut self, data: Bytes) {
         self.len += data.len();
         self.items.push_back(data);
-        self.need_read = self.len < self.capacity;
+        self.need_read = self.len < MAX_BUFFER_SIZE;
         if let Some(task) = self.task.take() {
             task.notify()
         }
@@ -200,7 +190,7 @@ impl Inner {
     fn readany(&mut self) -> Poll<Option<Bytes>, PayloadError> {
         if let Some(data) = self.items.pop_front() {
             self.len -= data.len();
-            self.need_read = self.len < self.capacity;
+            self.need_read = self.len < MAX_BUFFER_SIZE;
 
             if self.need_read && self.task.is_none() && !self.eof {
                 self.task = Some(current_task());
diff --git a/actix-http/src/message.rs b/actix-http/src/message.rs
index 25bc55ba..e1fb3a11 100644
--- a/actix-http/src/message.rs
+++ b/actix-http/src/message.rs
@@ -3,6 +3,7 @@ use std::collections::VecDeque;
 use std::rc::Rc;
 
 use bitflags::bitflags;
+use copyless::BoxHelper;
 
 use crate::extensions::Extensions;
 use crate::header::HeaderMap;
@@ -417,7 +418,7 @@ impl BoxedResponsePool {
             BoxedResponseHead { head: Some(head) }
         } else {
             BoxedResponseHead {
-                head: Some(Box::new(ResponseHead::default())),
+                head: Some(Box::alloc().init(ResponseHead::default())),
             }
         }
     }