diff --git a/.travis.yml b/.travis.yml
index 4642eb065..d12c7be0a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,14 +1,27 @@
 language: rust
-
-rust:
-  - 1.20.0
-  - stable
-  - beta
-  - nightly-2018-01-03
-
-sudo: required
+sudo: false
 dist: trusty
 
+cache:
+  cargo: true
+  apt: true
+
+matrix:
+  include:
+    - rust: 1.20.0
+    - rust: stable
+    - rust: beta
+    - rust: nightly
+  allow_failures:
+    - rust: nightly
+    - rust: beta
+
+#rust:
+#  - 1.20.0
+#  - stable
+#  - beta
+#  - nightly-2018-01-03
+
 env:
   global:
     - RUSTFLAGS="-C link-dead-code"
@@ -42,13 +55,10 @@ script:
       cd examples/multipart && cargo check && cd ../..
       cd examples/json && cargo check && cd ../..
       cd examples/template_tera && cargo check && cd ../..
-    fi
-  - |
-    if [[ "$TRAVIS_RUST_VERSION" == "beta" ]]; then
-       cd examples/diesel && cargo check && cd ../..
-       cd examples/tls && cargo check && cd ../..
-       cd examples/websocket-chat && cargo check && cd ../..
-       cd examples/websocket && cargo check && cd ../..
+      cd examples/diesel && cargo check && cd ../..
+      cd examples/tls && cargo check && cd ../..
+      cd examples/websocket-chat && cargo check && cd ../..
+      cd examples/websocket && cargo check && cd ../..
     fi
   - |
     if [[ "$TRAVIS_RUST_VERSION" == "nightly" && $CLIPPY ]]; then
@@ -58,7 +68,7 @@ script:
 # Upload docs
 after_success:
   - |
-    if [[ "$TRAVIS_OS_NAME" == "linux" && "$TRAVIS_PULL_REQUEST" = "false" && "$TRAVIS_BRANCH" == "master" && "$TRAVIS_RUST_VERSION" == "nightly-2018-01-03" ]]; then
+    if [[ "$TRAVIS_OS_NAME" == "linux" && "$TRAVIS_PULL_REQUEST" = "false" && "$TRAVIS_BRANCH" == "master" && "$TRAVIS_RUST_VERSION" == "nightly" ]]; then
       cargo doc --features alpn --no-deps &&
       echo "<meta http-equiv=refresh content=0;url=os_balloon/index.html>" > target/doc/index.html &&
       cargo install mdbook &&
diff --git a/src/encoding.rs b/src/encoding.rs
index 7eb5ddfaf..2a054536b 100644
--- a/src/encoding.rs
+++ b/src/encoding.rs
@@ -36,6 +36,7 @@ pub enum ContentEncoding {
 
 impl ContentEncoding {
 
+    #[inline]
     fn is_compression(&self) -> bool {
         match *self {
             ContentEncoding::Identity | ContentEncoding::Auto => false,
@@ -51,7 +52,7 @@ impl ContentEncoding {
             ContentEncoding::Identity | ContentEncoding::Auto => "identity",
         }
     }
-    // default quality
+    /// default quality value
     fn quality(&self) -> f64 {
         match *self {
             ContentEncoding::Br => 1.1,
@@ -62,6 +63,7 @@ impl ContentEncoding {
     }
 }
 
+// TODO: remove memory allocation
 impl<'a> From<&'a str> for ContentEncoding {
     fn from(s: &'a str) -> ContentEncoding {
         match s.trim().to_lowercase().as_ref() {
@@ -157,11 +159,7 @@ impl EncodedPayload {
                 Box::new(GzDecoder::new(BytesMut::with_capacity(8192).writer()))),
             _ => Decoder::Identity,
         };
-        EncodedPayload {
-            inner: inner,
-            decoder: dec,
-            error: false,
-        }
+        EncodedPayload{ inner: inner, decoder: dec, error: false }
     }
 }
 
@@ -254,6 +252,7 @@ impl PayloadWriter for EncodedPayload {
                     }
                     return
                 }
+                trace!("Error decoding gzip encoding");
             }
 
             Decoder::Deflate(ref mut decoder) => {
@@ -417,8 +416,7 @@ impl PayloadEncoder {
                 ContentEncoding::Br => ContentEncoder::Br(
                     BrotliEncoder::new(transfer, 5)),
                 ContentEncoding::Identity => ContentEncoder::Identity(transfer),
-                ContentEncoding::Auto =>
-                    unreachable!()
+                ContentEncoding::Auto => unreachable!()
             }
         )
     }
@@ -643,10 +641,8 @@ impl TransferEncoding {
     pub fn is_eof(&self) -> bool {
         match self.kind {
             TransferEncodingKind::Eof => true,
-            TransferEncodingKind::Chunked(ref eof) =>
-                *eof,
-            TransferEncodingKind::Length(ref remaining) =>
-                *remaining == 0,
+            TransferEncodingKind::Chunked(ref eof) => *eof,
+            TransferEncodingKind::Length(ref remaining) => *remaining == 0,
         }
     }
 
diff --git a/src/payload.rs b/src/payload.rs
index df2e4f7fb..002034da7 100644
--- a/src/payload.rs
+++ b/src/payload.rs
@@ -70,61 +70,73 @@ impl Payload {
     }
 
     /// Indicates EOF of payload
+    #[inline]
     pub fn eof(&self) -> bool {
         self.inner.borrow().eof()
     }
 
     /// Length of the data in this payload
+    #[inline]
     pub fn len(&self) -> usize {
         self.inner.borrow().len()
     }
 
     /// Is payload empty
+    #[inline]
     pub fn is_empty(&self) -> bool {
         self.inner.borrow().len() == 0
     }
 
     /// Get first available chunk of data.
+    #[inline]
     pub fn readany(&self) -> ReadAny {
         ReadAny(Rc::clone(&self.inner))
     }
 
     /// Get exact number of bytes
+    #[inline]
     pub fn readexactly(&self, size: usize) -> ReadExactly {
         ReadExactly(Rc::clone(&self.inner), size)
     }
 
     /// Read until `\n`
+    #[inline]
     pub fn readline(&self) -> ReadLine {
         ReadLine(Rc::clone(&self.inner))
     }
 
     /// Read until match line
+    #[inline]
     pub fn readuntil(&self, line: &[u8]) -> ReadUntil {
         ReadUntil(Rc::clone(&self.inner), line.to_vec())
     }
 
     #[doc(hidden)]
+    #[inline]
     pub fn readall(&self) -> Option<Bytes> {
         self.inner.borrow_mut().readall()
     }
 
     /// Put unused data back to payload
+    #[inline]
     pub fn unread_data(&mut self, data: Bytes) {
         self.inner.borrow_mut().unread_data(data);
     }
 
     /// Get size of payload buffer
+    #[inline]
     pub fn buffer_size(&self) -> usize {
         self.inner.borrow().buffer_size()
     }
 
     /// Set size of payload buffer
+    #[inline]
     pub fn set_buffer_size(&self, size: usize) {
         self.inner.borrow_mut().set_buffer_size(size)
     }
 
     /// Convert payload into compatible `HttpResponse` body stream
+    #[inline]
     pub fn stream(self) -> BodyStream {
         Box::new(self.map(|i| i.0).map_err(|e| e.into()))
     }
@@ -134,6 +146,7 @@ impl Stream for Payload {
     type Item = PayloadItem;
     type Error = PayloadError;
 
+    #[inline]
     fn poll(&mut self) -> Poll<Option<PayloadItem>, PayloadError> {
         self.inner.borrow_mut().readany()
     }