diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 54c3d93..ef7855b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,209 +17,42 @@ jobs:
       fail-fast: false
       matrix:
         include:
-         # Linux, gcc
-          - toolset: gcc-4.4
-            cxxstd: "98,0x"
-            address-model: 32,64
-            os: ubuntu-latest
-            container: ubuntu:16.04
-            install:
-              - g++-4.4-multilib
-            sources:
-              - "ppa:ubuntu-toolchain-r/test"
-          - toolset: gcc-4.6
-            cxxstd: "03,0x"
-            address-model: 32,64
-            os: ubuntu-latest
-            container: ubuntu:16.04
-            install:
-              - g++-4.6-multilib
-            sources:
-              - "ppa:ubuntu-toolchain-r/test"
-          - toolset: gcc-4.7
-            cxxstd: "03,11"
-            address-model: 32,64
-            os: ubuntu-latest
-            container: ubuntu:16.04
-            install:
-              - g++-4.7-multilib
-          - toolset: gcc-4.8
-            cxxstd: "03,11"
-            address-model: 32,64
-            os: ubuntu-latest
-            container: ubuntu:18.04
-            install:
-              - g++-4.8-multilib
-          - toolset: gcc-4.9
-            cxxstd: "03,11"
-            address-model: 32,64
-            os: ubuntu-latest
-            container: ubuntu:16.04
-            install:
-              - g++-4.9-multilib
-          - toolset: gcc-5
-            cxxstd: "03,11,14,1z"
-            address-model: 32,64
-            os: ubuntu-latest
-            container: ubuntu:16.04
-            install:
-              - g++-5-multilib
-          - toolset: gcc-6
-            cxxstd: "03,11,14,1z"
-            address-model: 32,64
-            os: ubuntu-latest
-            container: ubuntu:18.04
-            install:
-              - g++-6-multilib
-          - toolset: gcc-7
-            cxxstd: "03,11,14,17"
-            address-model: 32,64
-            os: ubuntu-latest
-            container: ubuntu:18.04
-            install:
-              - g++-7-multilib
-          - toolset: gcc-8
-            cxxstd: "03,11,14,17,2a"
-            address-model: 32,64
-            os: ubuntu-latest
-            container: ubuntu:18.04
-            install:
-              - g++-8-multilib
           - toolset: gcc-9
             cxxstd: "03,11,14,17,2a"
-            address-model: 32,64
             os: ubuntu-20.04
-            install:
-              - g++-9-multilib
           - toolset: gcc-10
-            cxxstd: "03,11,14,17,20"
-            address-model: 32,64
+            cxxstd: "03,11,14,17,2a"
             os: ubuntu-20.04
-            install:
-              - g++-10-multilib
+            install: g++-10
           - toolset: gcc-11
-            cxxstd: "03,11,14,17,20,23"
-            address-model: 32,64
-            os: ubuntu-22.04
-            install:
-              - g++-11-multilib
-          - toolset: gcc-12
-            cxxstd: "03,11,14,17,20,23"
-            address-model: 32,64
-            os: ubuntu-22.04
-            install:
-              - g++-12-multilib
-          # Linux, clang
-          - toolset: clang
-            compiler: clang++-3.5
-            cxxstd: "03,11"
-            os: ubuntu-latest
-            container: ubuntu:16.04
-            install:
-              - clang-3.5
-          - toolset: clang
-            compiler: clang++-3.6
-            cxxstd: "03,11,14"
-            os: ubuntu-latest
-            container: ubuntu:16.04
-            install:
-              - clang-3.6
-          - toolset: clang
-            compiler: clang++-3.7
-            cxxstd: "03,11,14"
-            os: ubuntu-latest
-            container: ubuntu:16.04
-            install:
-              - clang-3.7
-          - toolset: clang
-            compiler: clang++-3.8
-            cxxstd: "03,11,14"
-            os: ubuntu-latest
-            container: ubuntu:16.04
-            install:
-              - clang-3.8
-          - toolset: clang
-            compiler: clang++-3.9
-            cxxstd: "03,11,14"
-            os: ubuntu-latest
-            container: ubuntu:18.04
-            install:
-              - clang-3.9
-          - toolset: clang
-            compiler: clang++-4.0
-            cxxstd: "03,11,14"
-            os: ubuntu-latest
-            container: ubuntu:18.04
-            install:
-              - clang-4.0
-          - toolset: clang
-            compiler: clang++-5.0
-            cxxstd: "03,11,14,1z"
-            os: ubuntu-latest
-            container: ubuntu:18.04
-            install:
-              - clang-5.0
-          - toolset: clang
-            compiler: clang++-6.0
-            cxxstd: "03,11,14,17"
-            os: ubuntu-latest
-            container: ubuntu:18.04
-            install:
-              - clang-6.0
-          - toolset: clang
-            compiler: clang++-7
-            cxxstd: "03,11,14,17"
-            os: ubuntu-latest
-            container: ubuntu:18.04
-            install:
-              - clang-7
-          # Note: clang-8 does not fully support C++20, so it is not compatible with libstdc++-8 in this mode
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-20.04
+            install: g++-11
           - toolset: clang
             compiler: clang++-8
-            cxxstd: "03,11,14,17,2a"
-            os: ubuntu-latest
-            container: ubuntu:18.04
-            install:
-              - clang-8
-              - g++-7
-            gcc_toolchain: 7
+            cxxstd: "03,11,14,17"
+            os: ubuntu-20.04
+            install: clang-8
           - toolset: clang
             compiler: clang++-9
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-20.04
-            install:
-              - clang-9
+            install: clang-9
           - toolset: clang
             compiler: clang++-10
-            cxxstd: "03,11,14,17,20"
+            cxxstd: "03,11,14,17,2a"
             os: ubuntu-20.04
-            install:
-              - clang-10
+            install: clang-10
           - toolset: clang
             compiler: clang++-11
-            cxxstd: "03,11,14,17,20"
-            os: ubuntu-22.04
-            install:
-              - clang-11
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-20.04
+            install: clang-11
           - toolset: clang
             compiler: clang++-12
-            cxxstd: "03,11,14,17,20,2b"
-            os: ubuntu-22.04
-            install:
-              - clang-12
-          - toolset: clang
-            compiler: clang++-13
-            cxxstd: "03,11,14,17,20,2b"
-            os: ubuntu-22.04
-            install:
-              - clang-13
-          - toolset: clang
-            compiler: clang++-14
-            cxxstd: "03,11,14,17,20,2b"
-            os: ubuntu-22.04
-            install:
-              - clang-14
-          # MacOs, clang
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-20.04
+            install: clang-12
           - toolset: clang
             cxxstd: "03,11,14,17,2a"
             os: macos-11