diff --git a/.circleci/config.yml b/.circleci/config.yml
index 207611626e..51dc39a40c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -122,12 +122,12 @@ commands:
 
   build:
     steps:
-      - run: make V=1
-      - run: make V=1 examples
+      - run: make -j3 V=1
+      - run: make -j3 V=1 examples
 
   test:
     steps:
-      - run: make V=1 test-ci
+      - run: make -j3 V=1 test-ci
 
 executors:
   ubuntu:
diff --git a/.cirrus.yml b/.cirrus.yml
index 3b164288bf..0738c4573e 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -53,7 +53,7 @@ freebsd_task:
   env:
     CIRRUS_CLONE_DEPTH: 10
     CRYPTOGRAPHY_DONT_BUILD_RUST: 1
-    MAKE_FLAGS: -j 2
+    MAKE_FLAGS: -j 3
 
   pkginstall_script:
     - pkg update -f
@@ -145,7 +145,7 @@ windows_task:
   env:
     CIRRUS_CLONE_DEPTH: 10
     MSYS2_PATH_TYPE: inherit
-    MAKEFLAGS: -j 2
+    MAKEFLAGS: -j 3
 
   prepare_script: |
     %container_cmd% -l -c "cd $(echo '%cd%') && %prepare%"
@@ -241,7 +241,7 @@ macos_task:
 
   env:
     CIRRUS_CLONE_DEPTH: 10
-    MAKE_FLAGS: -j 4
+    MAKE_FLAGS: -j 12
 
   pkginstall_script:
     - echo libtool autoconf automake pkg-config ${install_packages} | xargs -Ix -n1 echo brew '"x"' > /tmp/Brewfile
@@ -278,7 +278,7 @@ linux_musl_task:
 
   env:
     CIRRUS_CLONE_DEPTH: 10
-    MAKEFLAGS: -j 2
+    MAKEFLAGS: -j 3
 
   pkginstall_script:
     - apk add --no-cache build-base autoconf automake libtool perl openssl-dev libssh2-dev zlib-dev brotli-dev zstd-dev libidn2-dev openldap-dev heimdal-dev libpsl-dev py3-impacket py3-asn1 py3-six py3-pycryptodomex perl-time-hires openssh stunnel sudo
diff --git a/.github/workflows/awslc.yml b/.github/workflows/awslc.yml
index 260f0c6d6b..f9bc563982 100644
--- a/.github/workflows/awslc.yml
+++ b/.github/workflows/awslc.yml
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: curl
 
-name: Linux
+name: Linux AWS-LC
 
 on:
   push:
@@ -40,6 +40,9 @@ concurrency:
 
 permissions: {}
 
+env:
+  MAKEFLAGS: -j 3
+
 jobs:
   autoconf:
     name: awslc (autoconf)
@@ -77,13 +80,13 @@ jobs:
         cd ..
       name: 'configure out-of-tree'
 
-    - run: make -C build -j 2 V=1
+    - run: make -C build V=1
       name: 'make'
 
-    - run: make -C build -j 2 V=1 examples
+    - run: make -C build V=1 examples
       name: 'make examples'
 
-    - run: make -C build -j 2 V=1 -C tests
+    - run: make -C build V=1 -C tests
       name: 'make tests'
 
     - run: make -C build V=1 test-ci
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index f8ef60089f..65cc28dc69 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -39,6 +39,9 @@ concurrency:
 
 permissions: {}
 
+env:
+  MAKEFLAGS: -j 3
+
 jobs:
   autotools:
     name: ${{ matrix.build.name }}
@@ -231,7 +234,7 @@ jobs:
         git clone --quiet --depth=1 https://github.com/openssl/openssl
         cd openssl
         ./config enable-tls1_3 --prefix=$HOME/openssl3
-        make install_sw
+        make -j1 install_sw
       name: 'install openssl'
 
     - if: ${{ contains(matrix.build.install_steps, 'quictls') }}
@@ -239,7 +242,7 @@ jobs:
         git clone --quiet --depth=1 -b OpenSSL_1_1_1t+quic https://github.com/quictls/openssl
         cd openssl
         ./config enable-tls1_3 --prefix=$HOME/quictls
-        make install_sw
+        make -j1 install_sw
       name: 'install quictls'
 
     - if: ${{ contains(matrix.build.install_steps, 'msh3') }}
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 037348c676..088852ac26 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -41,6 +41,7 @@ permissions: {}
 
 env:
   DEVELOPER_DIR: /Applications/Xcode_14.0.1.app/Contents/Developer
+  MAKEFLAGS: -j 5
 
 jobs:
   autotools:
diff --git a/.github/workflows/ngtcp2-gnutls.yml b/.github/workflows/ngtcp2-gnutls.yml
index 4477fac413..fed6d64710 100644
--- a/.github/workflows/ngtcp2-gnutls.yml
+++ b/.github/workflows/ngtcp2-gnutls.yml
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: curl
 
-name: ngtcp2
+name: ngtcp2 GnuTLS
 
 on:
   push:
@@ -44,6 +44,9 @@ concurrency:
 
 permissions: {}
 
+env:
+  MAKEFLAGS: -j 3
+
 jobs:
   autotools:
     name: ${{ matrix.build.name }}
@@ -81,7 +84,7 @@ jobs:
         git clone --quiet --depth=1 -b openssl-3.0.9+quic https://github.com/quictls/openssl
         cd openssl
         ./config --prefix=$HOME/all --libdir=$HOME/all/lib
-        make install_sw
+        make -j1 install_sw
       name: 'install quictls'
 
     - run: |
diff --git a/.github/workflows/ngtcp2-quictls.yml b/.github/workflows/ngtcp2-quictls.yml
index d81c56ecd2..85cf2f0e95 100644
--- a/.github/workflows/ngtcp2-quictls.yml
+++ b/.github/workflows/ngtcp2-quictls.yml
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: curl
 
-name: ngtcp2
+name: ngtcp2 quictls
 
 on:
   push:
@@ -44,6 +44,9 @@ concurrency:
 
 permissions: {}
 
+env:
+  MAKEFLAGS: -j 3
+
 jobs:
   autotools:
     name: ${{ matrix.build.name }}
@@ -74,7 +77,7 @@ jobs:
         git clone --quiet --depth=1 -b openssl-3.0.9+quic https://github.com/quictls/openssl
         cd openssl
         ./config --prefix=$HOME/all --libdir=$HOME/all/lib
-        make install_sw
+        make -j1 install_sw
       name: 'install quictls'
 
     - run: |
diff --git a/.github/workflows/ngtcp2-wolfssl.yml b/.github/workflows/ngtcp2-wolfssl.yml
index 304d6cbe4a..1ac997df70 100644
--- a/.github/workflows/ngtcp2-wolfssl.yml
+++ b/.github/workflows/ngtcp2-wolfssl.yml
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: curl
 
-name: ngtcp2
+name: ngtcp2 wolfSSL
 
 on:
   push:
@@ -44,6 +44,9 @@ concurrency:
 
 permissions: {}
 
+env:
+  MAKEFLAGS: -j 3
+
 jobs:
   autotools:
     name: ${{ matrix.build.name }}
@@ -84,7 +87,7 @@ jobs:
         git clone --quiet --depth=1 -b openssl-3.0.9+quic https://github.com/quictls/openssl
         cd openssl
         ./config --prefix=$HOME/all --libdir=$HOME/all/lib
-        make install_sw
+        make -j1 install_sw
       name: 'install quictls'
 
     - run: |
diff --git a/.github/workflows/torture.yml b/.github/workflows/torture.yml
index 8e089a0b17..cb639a5e38 100644
--- a/.github/workflows/torture.yml
+++ b/.github/workflows/torture.yml
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: curl
 
-name: Linux
+name: Linux torture
 
 on:
   push:
@@ -44,6 +44,9 @@ concurrency:
 
 permissions: {}
 
+env:
+  MAKEFLAGS: -j 3
+
 jobs:
   autotools:
     name: ${{ matrix.build.name }}
diff --git a/.github/workflows/wolfssl.yml b/.github/workflows/wolfssl.yml
index 904933712a..3ca65b1417 100644
--- a/.github/workflows/wolfssl.yml
+++ b/.github/workflows/wolfssl.yml
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: curl
 
-name: Linux
+name: Linux wolfSSL
 
 on:
   push:
@@ -44,6 +44,9 @@ concurrency:
 
 permissions: {}
 
+env:
+  MAKEFLAGS: -j 3
+
 jobs:
   autotools:
     name: ${{ matrix.build.name }}