owent · owent · Sep 15, 2026 · Sep 15, 2026 · Sep 15, 2026 · Sep 15, 2026
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
@@ -13,7 +13,7 @@
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: CI Job
         shell: bash
         run: |
@@ -30,7 +30,7 @@
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           lfs: "true"
       - name: Build & Test
@@ -103,7 +103,7 @@
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Build & Test
         shell: bash
         env:
@@ -141,7 +141,7 @@
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Build & Test
         shell: pwsh
         env:
@@ -165,20 +165,20 @@
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Build & Test
         shell: bash
         env:
           BUILD_SHARED_LIBS: ${{ matrix.build_shared_libs }}
         run: |
           C:/msys64/msys2_shell.cmd -mingw64 -defterm -no-start -here -lc "ci/do_ci.sh msys2.mingw.test"
       - name: Cache packages
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             C:/msys64/var/cache/pacman/pkg
             C:/msys64/var/lib/pacman
-          key: ${{ runner.os }}-${ hashFiles('.github/workflows/main.yml') } }}
+          key: ${{ runner.os }}-${{ hashFiles('.github/workflows/main.yml') }}
   coverage: # job id, can be any string
     name: Coverage
     # This job runs on Linux
@@ -192,7 +192,7 @@
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Generate coverage
         shell: bash
         env:
@@ -209,7 +209,7 @@
           fi
           bash ci/do_ci.sh coverage ;
       - name: Uploaded code coverage
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v7
         with:
           token: ${{secrets.CODECOV_TOKEN}} # not required for public repos
           fail_ci_if_error: true
@@ -230,7 +230,7 @@
       security-events: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Build
         shell: bash
         env:
@@ -240,7 +240,7 @@
         run: |
           bash ci/do_ci.sh codeql.configure
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v3
+        uses: github/codeql-action/init@v4
         with:
           config-file: ./.github/codeql/codeql-config.yml
       - name: Build
@@ -252,6 +252,6 @@
         run: |
           bash ci/do_ci.sh codeql.build
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v3
+        uses: github/codeql-action/analyze@v4
         with:
           category: "/language:cpp"
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
@@ -7,7 +7,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@v11
         with:
           stale-issue-message: "This issue was marked as stale due to lack of activity."
           days-before-issue-stale: 90

diff --git a/.github/workflows/sync.yml b/.github/workflows/sync.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           fetch-depth: 200
           lfs: "true"

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # CHANGELOG
 
+## 2.3.3
+
+1. Resume multiple callers of `promise_caller_manager` (C++20 coroutine) and `stackful_channel_context_base`
+   (stackful channel) in registration (FIFO) order instead of hash order. The multi-caller containers are now a
+   dual index of an order-preserving list and a hash map, so waiters queued behind the same task or channel wake
+   in the order they registered, matching the legacy stackful `next_list` behavior, while dedup-on-add and
+   passive removal stay O(1). Duplicate registrations of the same handle are now also ignored when
+   `LIBCOPP_MACRO_ENABLE_STD_VARIANT` is off. FIFO order and deduplication are preserved when the first caller
+   is removed and callers are registered again.
+2. Update dependencies.
+3. Update benchmark results.
+
 ## 2.3.2
 
 1. Rewrite document.

diff --git a/atframework/cmake-toolset b/atframework/cmake-toolset
diff --git a/docs/benchmarks/index.md b/docs/benchmarks/index.md
@@ -1,6 +1,6 @@
 # Benchmarks
 
-This section summarizes the stress test reports captured in `docs/reports` and provides the raw logs for reference.
+This section summarizes the benchmark reports captured in `docs/reports` and provides the raw logs for reference.
 
 ## How to run
 
@@ -18,5 +18,5 @@ This section summarizes the stress test reports captured in `docs/reports` and p
 
 ## Summary
 
-- Each report measures allocate/create/switch/remove cycles for coroutine contexts and tasks with different stack allocators.
+- Each report measures allocate/create/switch/remove cycles for stackful coroutine contexts and cotask tasks (with different stack allocators), as well as C++20 std coroutine callable/task generator benchmarks.
 - Use the raw logs below for precise numbers and environment details.
diff --git a/docs/benchmarks/linux.md b/docs/benchmarks/linux.md
@@ -2,11 +2,12 @@
 
 ## Summary
 
-- Environment: Linux 3.14.3-200.fc20.x86_64 (gcc 4.8.2)
-- CPU: AMD Phenom(tm) II X4 830 Processor (800MHz- 2800MHz)
-- Memory: 8GB DDR3-1333
+- Environment: GitHub Actions `ubuntu-latest` (Ubuntu 24.04), gcc 13.3.0
+- CPU: GitHub-hosted runner (4 vCPU)
+- Memory: 16 GB
 - Build type: RelWithDebInfo
-- Thread number: 1, stack memory cost 2.0GB
+- Thread number: 1
+- Source: [CI run 34942431606](https://github.com/owent/libcopp/actions/runs/34942431606) — job "Unix Build (gcc, ON)"
 
 ## Raw report
 

diff --git a/docs/benchmarks/windows.md b/docs/benchmarks/windows.md
@@ -2,11 +2,12 @@
 
 ## Summary
 
-- Environment: Windows 7, Visual Studio 2013 (VC 18)
-- CPU: AMD Phenom(tm) II X4 830 Processor (800MHz- 2800MHz)
-- Memory: 8GB DDR3-1333
-- Build type: Release
-- Thread number: 1, stack memory cost 2.0GB
+- Environment: GitHub Actions `windows-latest`, MinGW-w64 gcc 16.2.0
+- CPU: GitHub-hosted runner (4 vCPU)
+- Memory: 16 GB
+- Build type: RelWithDebInfo
+- Thread number: 1
+- Source: [CI run 34942431606](https://github.com/owent/libcopp/actions/runs/34942431606) — job "MinGW Build (ON)". The MSVC (Visual Studio 17 2022) job logs were truncated by GitHub, so MinGW-w64 results are shown.
 
 ## Raw report