diff --git a/.travis.yml b/.travis.yml
index 64284b72..2ba12145 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -48,8 +48,12 @@ matrix:
     # Default clang++ with libc++
     - os: linux
       compiler: clang++-libc++
-      script: b2 -j3 libs/beast/test toolset=clang cxxstd=11 cxxflags=-stdlib=libc++ linkflags=-stdlib=libc++
-      #script: b2 -j3 libs/beast/test toolset=clang cxxstd=11 cxxflags=-stdlib=libc++ linkflags="-stdlib=libc++ -lc++abi"
+      env:
+        - VARIANT=debug
+        - TOOLSET=clang
+        - COMPILER=clang++-libc++
+        - CXXSTD=11
+        - CXX_FLAGS="<cxxflags>-stdlib=libc++ <linkflags>-stdlib=libc++"
       addons:
         apt:
           packages:
@@ -58,7 +62,11 @@ matrix:
     # Default g++
     - os: linux
       compiler: g++
-      script: b2 -j3 libs/beast/test toolset=gcc cxxstd=11
+      env:
+        - VARIANT=release
+        - TOOLSET=gcc
+        - COMPILER=g++
+        - CXXSTD=11
 
     # GCC 8, C++17, libstdc++, release
     - os: linux
@@ -114,7 +122,7 @@ matrix:
             - llvm-toolchain-precise-3.8
             - *base_sources
 
-    # OSX Clang, C++14, libc++, debug, 
+    # OSX Clang, C++14, libc++, debug,
   # - if: branch != master
     - os: osx
       compiler: clang++
@@ -124,91 +132,19 @@ matrix:
         - COMPILER=clang++
         - CXXSTD=14
       before_install:
-        - brew install openssl
         - export OPENSSL_ROOT=$(brew --prefix openssl)
 
 install:
-  - export BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
   - cd ..
-  - git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
+  - $TRAVIS_BUILD_DIR/tools/get-boost.sh $TRAVIS_BRANCH $TRAVIS_BUILD_DIR
   - cd boost-root
-  - export BOOST_ROOT="`pwd`"
-  - export PATH="`pwd`":$PATH
-  - git submodule update --init libs/headers
-  - git submodule update --init tools/build
-  - git submodule update --init tools/boost_install
-  - git submodule update --init tools/boostdep
-  - git submodule update --init libs/align
-  - git submodule update --init libs/asio
-  - git submodule update --init libs/assert
-  - git submodule update --init libs/config
-  - git submodule update --init libs/core
-  - git submodule update --init libs/endian
-  - git submodule update --init libs/filesystem
-  - git submodule update --init libs/intrusive
-  - git submodule update --init libs/locale
-  - git submodule update --init libs/optional
-  - git submodule update --init libs/smart_ptr
-  - git submodule update --init libs/static_assert
-  - git submodule update --init libs/system
-  - git submodule update --init libs/throw_exception
-  - git submodule update --init libs/type_traits
-  - git submodule update --init libs/utility
-  - git submodule update --init libs/winapi
-
-  - git submodule update --init libs/algorithm
-  - git submodule update --init libs/array
-  - git submodule update --init libs/atomic
-  - git submodule update --init libs/bind
-  - git submodule update --init libs/chrono
-  - git submodule update --init libs/concept_check
-  - git submodule update --init libs/container
-  - git submodule update --init libs/container_hash
-  - git submodule update --init libs/context
-  - git submodule update --init libs/conversion
-  - git submodule update --init libs/coroutine
-  - git submodule update --init libs/date_time
-  - git submodule update --init libs/detail
-  - git submodule update --init libs/exception
-  - git submodule update --init libs/function
-  - git submodule update --init libs/function_types
-  - git submodule update --init libs/functional
-  - git submodule update --init libs/fusion
-  - git submodule update --init libs/integer
-  - git submodule update --init libs/io
-  - git submodule update --init libs/iterator
-  - git submodule update --init libs/lambda
-  - git submodule update --init libs/lexical_cast
-  - git submodule update --init libs/logic
-  - git submodule update --init libs/math
-  - git submodule update --init libs/move
-  - git submodule update --init libs/mp11
-  - git submodule update --init libs/mpl
-  - git submodule update --init libs/numeric/conversion
-  - git submodule update --init libs/pool
-  - git submodule update --init libs/predef
-  - git submodule update --init libs/preprocessor
-  - git submodule update --init libs/random
-  - git submodule update --init libs/range
-  - git submodule update --init libs/ratio
-  - git submodule update --init libs/rational
-  - git submodule update --init libs/serialization
-  - git submodule update --init libs/thread
-  - git submodule update --init libs/tokenizer
-  - git submodule update --init libs/tuple
-  - git submodule update --init libs/type_index
-  - git submodule update --init libs/typeof
-  - git submodule update --init libs/unordered
-  - rm -rf libs/beast
-  - mkdir libs/beast
-  - cp -r $TRAVIS_BUILD_DIR/* libs/beast
+  - export PATH=$PATH:"`pwd`"
+  - export BOOST_ROOT=$(pwd)
   - ./bootstrap.sh
-
+  - cp libs/beast/tools/user-config.jam ~/user-config.jam
+  - |-
+    echo "using $TOOLSET : : $COMPILER : $CXX_FLAGS ;" >> ~/user-config.jam
 script:
-  - |-
-    cp libs/beast/tools/user-config.jam ~/user-config.jam
-  - |-
-    echo "using $TOOLSET : : $COMPILER ;" >> ~/user-config.jam
   - cd ../boost-root
   - libs/beast/tools/retry.sh libs/beast/tools/build-and-test.sh
 
diff --git a/appveyor.yml b/appveyor.yml
index f28a276e..ebe44c39 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,30 +15,21 @@ configuration:
   #- Debug
   - Release
 
-image:
-  - Visual Studio 2017
-
 environment:
   OPENSSL_ROOT: C:\tools\vcpkg\installed\x64-windows
   matrix:
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       TOOLSET: msvc-14.0
-      ADDRMD: 64
-      CXXSTD: 11
 
 # VFALCO Appveyor has a 1 hour time limit, and
 #        I already test this configuration locally.
 #
 #    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
 #      TOOLSET: msvc-14.1
-#      CXXSTD: 11
-#      ADDRMD: 64
 
 # This configuration is not available yet
 #    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
 #      TOOLSET: msvc-14.2
-#      CXXSTD: 11
-#      ADDRMD: 64
 
 install:
   - SET BOOST_BRANCH=develop
@@ -46,86 +37,18 @@ install:
   - vcpkg install openssl --triplet x64-windows
   - ps: cp tools\user-config.jam ~\user-config.jam
   - CD ..
-  - git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
-  - cd boost-root
-  - git submodule update --init libs/headers
-  - git submodule update --init tools/build
-  - git submodule update --init tools/boost_install
-  - git submodule update --init tools/boostdep
-  - git submodule update --init libs/align
-  - git submodule update --init libs/asio
-  - git submodule update --init libs/assert
-  - git submodule update --init libs/config
-  - git submodule update --init libs/core
-  - git submodule update --init libs/endian
-  - git submodule update --init libs/filesystem
-  - git submodule update --init libs/intrusive
-  - git submodule update --init libs/locale
-  - git submodule update --init libs/optional
-  - git submodule update --init libs/smart_ptr
-  - git submodule update --init libs/static_assert
-  - git submodule update --init libs/system
-  - git submodule update --init libs/throw_exception
-  - git submodule update --init libs/type_traits
-  - git submodule update --init libs/utility
-  - git submodule update --init libs/winapi
-
-  - git submodule update --init libs/algorithm
-  - git submodule update --init libs/array
-  - git submodule update --init libs/atomic
-  - git submodule update --init libs/bind
-  - git submodule update --init libs/chrono
-  - git submodule update --init libs/concept_check
-  - git submodule update --init libs/container
-  - git submodule update --init libs/container_hash
-  - git submodule update --init libs/context
-  - git submodule update --init libs/conversion
-  - git submodule update --init libs/coroutine
-  - git submodule update --init libs/date_time
-  - git submodule update --init libs/detail
-  - git submodule update --init libs/exception
-  - git submodule update --init libs/function
-  - git submodule update --init libs/function_types
-  - git submodule update --init libs/functional
-  - git submodule update --init libs/fusion
-  - git submodule update --init libs/integer
-  - git submodule update --init libs/io
-  - git submodule update --init libs/iterator
-  - git submodule update --init libs/lambda
-  - git submodule update --init libs/lexical_cast
-  - git submodule update --init libs/logic
-  - git submodule update --init libs/math
-  - git submodule update --init libs/move
-  - git submodule update --init libs/mp11
-  - git submodule update --init libs/mpl
-  - git submodule update --init libs/numeric/conversion
-  - git submodule update --init libs/pool
-  - git submodule update --init libs/predef
-  - git submodule update --init libs/preprocessor
-  - git submodule update --init libs/random
-  - git submodule update --init libs/range
-  - git submodule update --init libs/ratio
-  - git submodule update --init libs/rational
-  - git submodule update --init libs/serialization
-  - git submodule update --init libs/thread
-  - git submodule update --init libs/tokenizer
-  - git submodule update --init libs/tuple
-  - git submodule update --init libs/type_index
-  - git submodule update --init libs/typeof
-  - git submodule update --init libs/unordered
-  - rm -rf libs\beast
-  - MKDIR libs\beast
-  - XCOPY /s /e /q %APPVEYOR_BUILD_FOLDER% libs\beast\
+  - bash -c '$APPVEYOR_BUILD_FOLDER/tools/get-boost.sh $APPVEYOR_REPO_BRANCH $APPVEYOR_BUILD_FOLDER'
+  - CD boost-root
   - CMD /c bootstrap
   - b2 headers
 
 build: off
 
 test_script:
-  - if not "%CXXSTD%" == "" set CXXSTD=cxxstd=%CXXSTD%
-  - if not "%ADDRMD%" == "" set ADDRMD=address-model=%ADDRMD%
-  - b2 --debug-configuration variant=release %CXXSTD% %ADDRMD% toolset=%TOOLSET% libs/beast/example
-  - b2 --debug-configuration variant=release %CXXSTD% %ADDRMD% toolset=%TOOLSET% --verbose-test libs/beast/test//run-fat-tests
+  - b2 --debug-configuration variant=release cxxstd=14 address-model=64 toolset=msvc-14.0 libs/beast/example -j3
+  - b2 --debug-configuration variant=release cxxstd=14 address-model=64 toolset=msvc-14.0 --verbose-test libs/beast/test//run-fat-tests -j3
+  - b2 --debug-configuration variant=release cxxstd=17 define="BOOST_BEAST_USE_STD_STRING_VIEW" address-model=64 toolset=msvc-14.1 libs/beast/example -j3
+  - b2 --debug-configuration variant=release cxxstd=17 define="BOOST_BEAST_USE_STD_STRING_VIEW" address-model=64 toolset=msvc-14.1 --verbose-test libs/beast/test//run-fat-tests -j3
 
 cache:
 - c:\tools\vcpkg\installed\
diff --git a/tools/get-boost.sh b/tools/get-boost.sh
new file mode 100755
index 00000000..648a27f2
--- /dev/null
+++ b/tools/get-boost.sh
@@ -0,0 +1,88 @@
+#! /bin/sh
+
+set -e
+
+build_dir=$2
+
+branch="master"
+if [ "$1" != "master" ]; then
+    branch="develop"
+fi
+
+git clone -b $branch --depth 1 https://github.com/boostorg/boost.git boost-root
+cd boost-root
+
+# Use a reasonably large depth to prevent intermittent update failures due to
+# commits being on a submodule's master before the superproject is updated.
+git submodule update --init --depth 20 --jobs 4 \
+    libs/array \
+    libs/headers \
+    tools/build \
+    tools/boost_install \
+    tools/boostdep \
+    libs/align \
+    libs/asio \
+    libs/assert \
+    libs/config \
+    libs/core \
+    libs/endian \
+    libs/filesystem \
+    libs/intrusive \
+    libs/locale \
+    libs/optional \
+    libs/smart_ptr \
+    libs/static_assert \
+    libs/system \
+    libs/throw_exception \
+    libs/type_traits \
+    libs/utility \
+    libs/winapi \
+    libs/algorithm \
+    libs/array \
+    libs/atomic \
+    libs/bind \
+    libs/chrono \
+    libs/concept_check \
+    libs/container \
+    libs/container_hash \
+    libs/context \
+    libs/conversion \
+    libs/coroutine \
+    libs/date_time \
+    libs/detail \
+    libs/exception \
+    libs/function \
+    libs/function_types \
+    libs/functional \
+    libs/fusion \
+    libs/integer \
+    libs/io \
+    libs/iterator \
+    libs/lambda \
+    libs/lexical_cast \
+    libs/logic \
+    libs/math \
+    libs/move \
+    libs/mp11 \
+    libs/mpl \
+    libs/numeric/conversion \
+    libs/pool \
+    libs/predef \
+    libs/preprocessor \
+    libs/random \
+    libs/range \
+    libs/ratio \
+    libs/rational \
+    libs/thread \
+    libs/tuple \
+    libs/type_index \
+    libs/typeof \
+    libs/unordered
+
+echo Submodule update complete
+
+echo "BUILD_DIR: $build_dir"
+
+rm -rf libs/beast
+mkdir libs/beast
+cp -r $build_dir libs/