Improve binding build times.

.github/workflows/build-test-macos.yml

@@ -94,15 +94,13 @@ jobs:
         if: ${{inputs.mrbind}}
         env:
           PATH: ${{matrix.brewpath}}/opt/make/libexec/gnubin:${{matrix.brewpath}}/opt/grep/libexec/gnubin:${{env.PATH}}
-        # Using 4 threads on github runners, because they have only 8G of RAM.
         run: |
           make --version
           make -f scripts/mrbind/generate.mk \
             -B --trace \
             PYTHON_PKGCONF_NAME=python-3.10-embed \
             EXTRA_CFLAGS='-DMB_PB11_ALLOW_STD_EXPECTED=0 -DMR_USE_STD_EXPECTED=0' \
-            MESHLIB_SHLIB_DIR=build/${{matrix.config}}/bin \
-            ${{ fromJSON('["-j8", "-j4"]')[matrix.os == 'github-arm'] }}
+            MESHLIB_SHLIB_DIR=build/${{matrix.config}}/bin
 
       - name: Run Start-and-Exit Tests
         if: ${{ matrix.os == 'arm' }}

.github/workflows/build-test-windows.yml

@@ -147,7 +147,7 @@ jobs:
         if: ${{inputs.mrbind}}
         with:
           msystem: clang64
-          install: make gawk
+          install: make gawk procps-ng
           location: C:\msys64_meshlib_mrbind
 
       - name: Install Clang in MSYS2

.github/workflows/pip-build.yml

@@ -288,7 +288,7 @@ jobs:
         uses: msys2/setup-msys2@v2
         with:
           msystem: clang64
-          install: make gawk
+          install: make gawk procps-ng
           location: C:\msys64_meshlib_mrbind
 
       - name: Install Clang in MSYS2

.github/workflows/prepare-images.yml

@@ -46,6 +46,7 @@ jobs:
               - 'scripts/build_thirdparty.sh'
               - 'scripts/install_apt_requirements.sh'
               - 'scripts/install_dnf_requirements.sh'
+              - 'scripts/mrbind/install_deps_ubuntu.sh'
               - 'thirdparty/!(install.bat|vcpkg/**)'
 
       - name: Filter Windows paths

scripts/mrbind/compiler_only_flags.txt

@@ -7,3 +7,4 @@
 -DMB_PB11_STRIPPED_NAMESPACES='"MR","MR.Extra"'
 -DMB_PB11_ENABLE_CXX_STYLE_CONTAINER_METHODS
 -DMB_PB11_MERGE_STL_TL_EXPECTED
+-DMB_PB11_NO_REGISTER_TYPE_DEPS

scripts/mrbind/generate.mk

@@ -250,12 +250,48 @@ PCH_CODEGEN_FLAGS :=
 # The `-fpch-instantiate-templates` flag is optional, while the other two are necessary (at least the first one), and are usually used together.
 # PCH_CODEGEN_FLAGS := -fpch-codegen -fpch-debuginfo -fpch-instantiate-templates
 
+
+# Guess the amount of RAM we have (in gigabytes), to select an appropriate build profile.
+ifneq ($(IS_MACOS),)
+ASSUME_RAM := $(shell bash -c 'echo $$(($(shell sysctl -n hw.memsize) / 1000000000))')
+else
+# `--giga` uses 10^3 instead of 2^10, which is actually good for us, since it overreports a bit, which counters computers typically having slightly less RAM than 2^N gigs.
+ASSUME_RAM := $(shell LANG= free --giga 2>/dev/null | gawk 'NR==2{print $$2}')
+endif
+
+ifneq ($(ASSUME_RAM),)
+ifeq ($(call safe_shell,echo $$(($(ASSUME_RAM) >= 64))),1)
+override ram_string := >= 64G
 # How many translation units to use for the bindings. Bigger value = less RAM usage, but usually slower build speed.
 # When changing this, update the default value for `-j` above.
+NUM_FRAGMENTS := 8
+# The default number of jobs. Override with `-jN` or `JOBS=N`, both work fine.
+JOBS := 8
+else ifeq ($(call safe_shell,echo $$(($(ASSUME_RAM) >= 32))),1)
+override ram_string := ~32G
+NUM_FRAGMENTS := 16
+JOBS := 8
+else ifeq ($(call safe_shell,echo $$(($(ASSUME_RAM) >= 16))),1)
+override ram_string := ~16G
+NUM_FRAGMENTS := 64
+JOBS := 8
+else
+override ram_string := ~8G (oof)
 NUM_FRAGMENTS := 64
+JOBS := 4
+endif
+else
+override ram_string := unknown, assuming ~16G
+NUM_FRAGMENTS := 64
+JOBS := 8
+endif
+MAKEFLAGS += -j$(JOBS)
+ifeq ($(filter-out file,$(origin NUM_FRAGMENTS) $(origin JOBS)),)
+$(info RAM $(ram_string), defaulting to NUM_FRAGMENTS=$(NUM_FRAGMENTS) -j$(JOBS))
+else
+$(info RAM $(ram_string), NUM_FRAGMENTS=$(NUM_FRAGMENTS) -j$(JOBS))
+endif
 
-# The default number of jobs. Override with `-jN`.
-MAKEFLAGS += -j8
 
 # --- End of configuration variables.
 

scripts/mrbind/install_deps_ubuntu.sh

@@ -33,4 +33,5 @@ fi
 
 # Install the packages.
 # Could also add `sudo` here for `install_mrbind_ubuntu.sh`, but I think the user can do that themselves.
-apt install -y make cmake ninja-build gawk clang-$CLANG_VER lld-$CLANG_VER clang-tools-$CLANG_VER libclang-$CLANG_VER-dev llvm-$CLANG_VER-dev
+# `procps` is for the `free` utility, to measure how much RAM we have.
+apt install -y make cmake ninja-build gawk procps clang-$CLANG_VER lld-$CLANG_VER clang-tools-$CLANG_VER libclang-$CLANG_VER-dev llvm-$CLANG_VER-dev

scripts/mrbind/install_deps_windows_msys2.bat

@@ -53,6 +53,7 @@ rem ------ Install a specific version of Clang
 call %MSYS2_DIR%\msys2_shell.cmd -no-start -defterm -clang64 -c "'%~dp0'/msys2_install_clang_ver.sh %CLANG_VER%"
 
 rem ------ Install needed packages
-call %MSYS2_DIR%\msys2_shell.cmd -no-start -defterm -clang64 -c "pacman -S --noconfirm --needed make $MINGW_PACKAGE_PREFIX-cmake"
+rem `procps-ns` is for the `free` command to measure RAM.
+call %MSYS2_DIR%\msys2_shell.cmd -no-start -defterm -clang64 -c "pacman -S --noconfirm --needed make procps-ng $MINGW_PACKAGE_PREFIX-cmake"
 
-endlocal
+endlocal

scripts/mrbind/mrbind_commit.txt

@@ -1 +1 @@
-dd8cd39c949891539b9c3d830917719ce12798ff
+ec31a36432faa8ac78719c0c3023ec24cf5c18ac

scripts/mrbind/mrbind_flags.txt

@@ -1,5 +1,5 @@
 --format=macros
---ignore-pch-flags
+--combine-types=cv,ref,ptr,smart_ptr
 --ignore ::
 --allow MR
 --ignore MR::detail

scripts/mrbind/mrbind_flags_for_helpers.txt

@@ -1,4 +1,4 @@
 --format=macros
---ignore-pch-flags
+--combine-types=cv,ref,ptr,smart_ptr
 --ignore ::
 --allow MR::Extra

source/MRMesh/MRObject.h

@@ -209,7 +209,9 @@ class MRMESH_CLASS Object : public ObjectChildrenHolder
     ///   models in the folder by given path and
     ///   fields in given JSON
     /// \param childId is its ordinal number within the parent
-    MRMESH_API Expected<std::vector<std::future<Expected<void>>>> serializeRecursive( const std::filesystem::path& path, Json::Value& root, int childId ) const;
+    // This would be automatically skipped in the bindings anyway because of the `Json::Value` parameter.
+    // But skipping it here prevents the vector-of-futures type from being registered, which is helpful.
+    MRMESH_API MR_BIND_IGNORE Expected<std::vector<std::future<Expected<void>>>> serializeRecursive( const std::filesystem::path& path, Json::Value& root, int childId ) const;
 
     /// loads subtree into this Object
     ///   models from the folder by given path and