Toolchain size: main (stable/20211026) vs rebranch (stable/20220421)

On macOS and Linux toolchains we are seeing ~130% size increase in llvm-profdata between main (stable/20211026) and rebranch (stable/20220421).

macOS:

Size changed
+-----------------------------------------------------------------------------------------------------------+-----------+---------------+-------+
| File                                                                                                      | main (MB) | rebranch (MB) | Delta |
+-----------------------------------------------------------------------------------------------------------+-----------+---------------+-------+
| /usr/lib/swift/macosx/libswiftRegexBuilder.dylib                                                          |    1.40   |      1.24     |  -12% |
| /usr/lib/swift/appletvsimulator/libswiftRegexBuilder.dylib                                                |    1.43   |      1.27     |  -12% |
| /usr/lib/swift/watchsimulator/libswiftRegexBuilder.dylib                                                  |    2.14   |      1.89     |  -11% |
| /usr/lib/swift/watchos/libswiftRegexBuilder.dylib                                                         |    1.35   |      1.20     |  -11% |
| /usr/lib/swift/iphonesimulator/libswiftRegexBuilder.dylib                                                 |    2.01   |      1.80     |  -11% |
| /usr/lib/swift/iphoneos/libswiftRegexBuilder.dylib                                                        |    2.65   |      2.42     |  -9%  |
| /usr/lib/swift/iphoneos/libswiftSwiftOnoneSupport.dylib                                                   |    1.50   |      1.47     |  -2%  |
| /usr/lib/swift/watchos/libswift_Differentiation.dylib                                                     |    1.03   |      1.02     |  -2%  |
| /usr/bin/swift-build-tool                                                                                 |    3.02   |      2.97     |  -2%  |
| /usr/lib/swift-5.5/iphonesimulator/libswift_Concurrency.dylib                                             |    1.11   |      1.09     |  -1%  |
| /usr/lib/swift-5.5/appletvsimulator/libswift_Concurrency.dylib                                            |    1.11   |      1.09     |  -1%  |
| /usr/lib/swift/watchos/libswiftRemoteMirror.dylib                                                         |    1.43   |      1.41     |  -1%  |
| /usr/lib/swift/macosx/libswiftRemoteMirror.dylib                                                          |    1.66   |      1.64     |  -1%  |
| /usr/lib/swift/appletvsimulator/libswiftRemoteMirror.dylib                                                |    1.66   |      1.64     |  -1%  |
| /usr/bin/docc                                                                                             |   16.38   |     16.20     |  -1%  |
| /usr/lib/swift/iphonesimulator/libswift_Differentiation.dylib                                             |    1.70   |      1.68     |  -1%  |
| /usr/lib/swift/watchsimulator/libswift_Differentiation.dylib                                              |    1.89   |      1.87     |  -1%  |
| /usr/lib/swift/iphonesimulator/libswiftRemoteMirror.dylib                                                 |    2.50   |      2.48     |  -1%  |
| /usr/lib/swift/watchsimulator/libswiftRemoteMirror.dylib                                                  |    2.56   |      2.54     |  -1%  |
| /usr/lib/swift/macosx/libSwiftOptions.dylib                                                               |    2.26   |      2.24     |  -1%  |
| /usr/bin/sourcekit-lsp                                                                                    |   61.11   |     61.46     |   1%  |
| /usr/lib/swift/macosx/libswift_StringProcessing.dylib                                                     |    2.32   |      2.34     |   1%  |
| /usr/lib/swift/iphonesimulator/libswift_StringProcessing.dylib                                            |    3.41   |      3.44     |   1%  |
| /usr/lib/swift/watchsimulator/libswiftSwiftOnoneSupport.dylib                                             |    1.27   |      1.28     |   1%  |
| /usr/lib/swift/macosx/lib_InternalSwiftSyntaxParser.dylib                                                 |   79.13   |     80.27     |   1%  |
| /System/Library/PrivateFrameworks/LLDB.framework/Versions/A/LLDB                                          |   449.75  |     456.27    |   1%  |
| /usr/bin/swift-frontend                                                                                   |   424.70  |     431.28    |   2%  |
| /usr/lib/sourcekitd.framework/Versions/A/XPCServices/SourceKitService.xpc/Contents/MacOS/SourceKitService |   423.28  |     429.96    |   2%  |
| /usr/lib/clang/13.0.0/lib/darwin/libclang_rt.fuzzer_no_main_osx.a                                         |    1.95   |      1.98     |   2%  |
| /usr/lib/clang/13.0.0/lib/darwin/libclang_rt.fuzzer_osx.a                                                 |    1.95   |      1.98     |   2%  |
| /usr/lib/swift/macosx/lib_InternalSwiftStaticMirror.dylib                                                 |    6.25   |      6.35     |   2%  |
| /usr/bin/dsymutil                                                                                         |   137.35  |     140.11    |   2%  |
| /usr/lib/swift/macosx/lib_InternalSwiftScan.dylib                                                         |   414.65  |     424.03    |   2%  |
| /usr/bin/clang-13                                                                                         |   362.05  |     370.80    |   2%  |
| /usr/lib/clang/13.0.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib                                       |    2.42   |      2.48     |   3%  |
| /usr/lib/libLTO.dylib                                                                                     |   191.32  |     196.69    |   3%  |
| /usr/lib/clang/13.0.0/lib/darwin/libclang_rt.tsan_osx_dynamic.dylib                                       |    2.64   |      2.72     |   3%  |
| /usr/lib/libIndexStore.dylib                                                                              |   17.61   |     18.13     |   3%  |
| /usr/lib/clang/13.0.0/lib/darwin/libclang_rt.lsan_osx_dynamic.dylib                                       |    1.06   |      1.09     |   3%  |
| /usr/bin/clangd                                                                                           |   147.95  |     152.65    |   3%  |
| /usr/lib/clang/13.0.0/lib/darwin/libclang_rt.xray_osx.a                                                   |    1.69   |      1.75     |   4%  |
| /usr/bin/llvm-cov                                                                                         |   13.44   |     14.17     |   5%  |
| /usr/lib/clang/13.0.0/lib/darwin/libclang_rt.ubsan_osx.a                                                  |    1.69   |      1.83     |   8%  |
| /usr/lib/clang/13.0.0/lib/darwin/libclang_rt.ubsan_osx_dynamic.dylib                                      |    0.95   |      1.05     |  10%  |
| /usr/bin/llvm-profdata                                                                                    |    6.43   |     15.08     |  135% |
+-----------------------------------------------------------------------------------------------------------+-----------+---------------+-------+

Ubuntu 20.04:

Size changed
+-------------------------------------------------------------------+-----------+---------------+-------+
| File                                                              | main (MB) | rebranch (MB) | Delta |
+-------------------------------------------------------------------+-----------+---------------+-------+
| /lib/clang/13.0.0/lib/linux/libclang_rt.tsan-x86_64.a             |    4.94   |      4.40     |  -11% |
| /lib/clang/13.0.0/lib/linux/libclang_rt.fuzzer_no_main-x86_64.a   |    3.68   |      3.34     |  -9%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.fuzzer-x86_64.a           |    3.68   |      3.34     |  -9%  |
| /bin/swift-driver                                                 |   37.00   |     34.43     |  -7%  |
| /bin/swift-build-sdk-interfaces                                   |   37.03   |     34.47     |  -7%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.scudo_minimal-x86_64.a    |    1.11   |      1.05     |  -5%  |
| /bin/sourcekit-lsp                                                |   101.71  |     96.27     |  -5%  |
| /bin/docc                                                         |   55.54   |     52.83     |  -5%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.asan-x86_64.a             |    4.55   |      4.35     |  -4%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.scudo-x86_64.a            |    1.62   |      1.58     |  -3%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.lsan-x86_64.a             |    1.57   |      1.53     |  -3%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.msan-x86_64.a             |    3.43   |      3.34     |  -3%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.hwasan_aliases-x86_64.a   |    1.80   |      1.76     |  -2%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.hwasan-x86_64.a           |    1.79   |      1.75     |  -2%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.cfi_diag-x86_64.a         |    1.40   |      1.37     |  -2%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.ubsan_standalone-x86_64.a |    1.37   |      1.35     |  -1%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.dfsan-x86_64.a            |    1.50   |      1.49     |  -1%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.stats-x86_64.a            |    1.17   |      1.16     |  -1%  |
| /lib/swift/pm/llbuild/libllbuild.so                               |    1.83   |      1.82     |  -1%  |
| /bin/llvm-cov                                                     |    6.55   |      6.59     |   1%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.memprof-x86_64.a          |    2.41   |      2.43     |   1%  |
| /lib/swift/linux/lib_InternalSwiftStaticMirror.so                 |    6.38   |      6.42     |   1%  |
| /bin/swift-help                                                   |   10.36   |     10.46     |   1%  |
| /bin/swift-demangle                                               |    1.55   |      1.56     |   1%  |
| /lib/swift/linux/lib_InternalSwiftSyntaxParser.so                 |   33.53   |     34.27     |   2%  |
| /bin/swift-package                                                |   87.36   |     89.50     |   2%  |
| /lib/liblldb.so.13.0.0git                                         |   190.00  |     195.26    |   3%  |
| /bin/swift-build-tool                                             |    1.40   |      1.44     |   3%  |
| /bin/lldb-server                                                  |   160.20  |     164.94    |   3%  |
| /bin/swift-frontend                                               |   173.43  |     178.68    |   3%  |
| /lib/libsourcekitdInProc.so                                       |   186.24  |     191.98    |   3%  |
| /lib/swift/linux/lib_InternalSwiftScan.so                         |   169.48  |     175.00    |   3%  |
| /lib/libLTO.so.13git                                              |   78.73   |     81.34     |   3%  |
| /bin/lld                                                          |   85.72   |     88.59     |   3%  |
| /lib/clang/13.0.0/lib/linux/libclang_rt.memprof-x86_64.so         |    1.25   |      1.30     |   4%  |
| /bin/clang-13                                                     |   134.96  |     140.23    |   4%  |
| /bin/clangd                                                       |   52.52   |     54.60     |   4%  |
| /bin/llvm-profdata                                                |    3.19   |      7.30     |  129% |
+-------------------------------------------------------------------+-----------+---------------+-------+

Similar statistics on Windows:

    5.7     |    main   | rebranch  | Module
------------+-----------+-----------+--------------------------
    680,448      746,496     776,192 ArgumentParser.dll
     83,968                   83,968 ArgumentParserToolInfo.dll
    306,176      305,664     304,640 Basics.dll
     12,288       12,800      12,288 BlocksRuntime.dll
    669,696      655,360     655,360 Build.dll
 92,130,304               94,942,720 clang++.exe
 92,130,304               94,942,720 clang-cl.exe
 92,130,304               94,942,720 clang-cpp.exe
  2,515,456    2,530,816   2,622,976 clang-format.exe
 45,252,096   45,304,832  49,368,576 clang-tidy.exe
 92,130,304   92,388,352  94,942,720 clang.exe
              36,609,024             clangd.exe
     17,920       17,920      17,920 Collections.dll
  6,374,400    6,422,016   6,450,176 Commands.dll
    800,256      760,320     724,480 Crypto.dll
    118,784      118,784     118,784 DequeModule.dll
    235,008      240,128     235,008 dispatch.dll
 39,016,448   39,164,928  40,487,424 dsymutil.exe
    588,800      611,328     603,136 IndexStoreDB.dll
 57,595,392               59,163,136 ld.lld.exe
 57,595,392               59,163,136 ld64.lld.exe
 85,999,104   86,249,984  88,544,256 libclang.dll
    375,808      380,416     389,632 libIndexStore.dll
129,575,424  130,000,384 132,140,032 liblldb.dll
  1,819,648    1,862,656   1,851,392 llbuild.dll
    192,000      192,000     192,512 llbuildSwift.dll
 57,595,392               59,163,136 lld-link.exe
 57,595,392   57,867,264  59,163,136 lld.exe
115,479,040  115,744,768 117,795,840 lldb-server.exe
    494,080      502,272     507,392 lldb-vscode.exe
    264,192      267,776     272,896 lldb.exe
 12,826,624   12,858,880  14,723,584 llvm-ar.exe
  4,936,192    4,965,376   5,078,528 llvm-cov.exe
    383,488      388,096     422,912 llvm-cvtres.exe
    458,240      463,360     471,040 llvm-cxxfilt.exe
 12,826,624               14,723,584 llvm-dlltool.exe
 11,035,136   11,067,904  12,956,672 llvm-dwarfdump.exe
 37,894,144   38,037,504  39,307,264 llvm-dwp.exe
 12,826,624               14,723,584 llvm-lib.exe
  4,255,232    4,277,760   4,371,456 llvm-lipo.exe
    255,488      258,560     267,264 llvm-mt.exe
 13,213,184   13,249,536  15,135,744 llvm-nm.exe
  4,841,984    4,870,144   4,993,024 llvm-objcopy.exe
 14,672,384   14,712,832  16,620,544 llvm-objdump.exe
  6,077,952    6,118,400   6,219,264 llvm-pdbutil.exe
  2,266,624    2,274,304   5,652,480 llvm-profdata.exe
 12,826,624               14,723,584 llvm-ranlib.exe
    628,224      632,320     652,288 llvm-rc.exe
  7,144,448                7,271,936 llvm-readelf.exe
  7,144,448    7,187,968   7,271,936 llvm-readobj.exe
  4,225,536    4,247,552   4,339,712 llvm-size.exe
    358,912      363,520     370,688 llvm-strings.exe
  4,841,984                4,993,024 llvm-strip.exe
  5,626,880    5,661,184   5,828,608 llvm-symbolizer.exe
    422,912      428,544     431,616 llvm-undname.exe
 55,236,608   55,468,032  56,909,312 LTO.dll
    304,128      304,640     304,128 OrderedCollections.dll
    922,624      949,760     947,712 PackageGraph.dll
    565,760      568,320     566,784 PackageLoading.dll
    903,680      905,216     904,192 PackageModel.dll
                  50,176             PriorityQueueModule.dll
     11,264       11,264      11,264 repl_swift.exe
  2,464,768    2,430,976   2,519,040 sourcekit-lsp.exe
117,256,192  117,572,608 119,690,240 sourcekitdInProc.dll
    543,232      541,696     541,696 SPMBuildCore.dll
115,804,160  116,089,856 118,066,176 swift-api-digester.exe
115,804,160  116,089,856 118,066,176 swift-autolink-extract.exe
     44,032       44,032      44,032 swift-build-sdk-interfaces.exe
  1,710,592    1,751,552   1,733,632 swift-build-tool.exe
     19,968       20,992      20,992 swift-build.exe
    701,440      710,144     715,264 swift-demangle.exe
115,804,160  116,089,856 118,066,176 swift-frontend.exe
     48,128       48,128      48,128 swift-help.exe
     22,528       23,552      23,552 swift-package.exe
     19,968       20,992      20,992 swift-run.exe
115,804,160  116,089,856 118,066,176 swift-symbolgraph-extract.exe
     19,968       20,992      20,992 swift-test.exe
     29,696  116,089,856      30,208 swift.exe
     29,696  116,089,856      30,208 swiftc.exe
    203,264      204,800     204,800 swiftDemangle.dll
  2,100,736    2,105,856   2,100,224 SwiftDriver.dll
    103,936      104,448     103,936 SwiftDriverExecution.dll
    956,928      957,440     967,680 SwiftOptions.dll
    202,240      199,680     201,216 SystemPackage.dll
    561,152      556,544     555,008 TSCBasic.dll
     24,064       24,064      24,064 TSCLibc.dll
  1,546,752    1,560,064   1,556,992 TSCUtility.dll
 57,595,392               59,163,136 wasm-ld.exe
  1,313,792    1,313,280   1,310,720 Workspace.dll
    619,520      619,008     622,592 Yams.dll
115,838,464  116,121,600 118,095,360 _InternalSwiftScan.dll
 21,190,144   21,186,048  21,504,000 _InternalSwiftSyntaxParser.dll

It appears that most binaries have increased by ~2M.

Additional data from llvm lib:

Size changed
+-----------------------------------------------------------------------------------------------+-----------+---------------+-------+
| File                                                                                          | main (MB) | rebranch (MB) | Delta |
+-----------------------------------------------------------------------------------------------+-----------+---------------+-------+
| /libclangTransformer.a                                                                        |    1.91   |      1.61     |  -15% |
| /Transforms/InstCombine/CMakeFiles/LLVMInstCombine.dir/InstCombineSelect.cpp.o                |    1.47   |      1.40     |  -5%  |
| /libLLVMDebugInfoCodeView.a                                                                   |    4.11   |      3.95     |  -4%  |
| /CodeGen/CMakeFiles/LLVMCodeGen.dir/RegAllocGreedy.cpp.o                                      |    1.09   |      1.06     |  -3%  |
| /Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/ScalarEvolutionExpander.cpp.o             |    1.05   |      1.02     |  -3%  |
| /Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMISelDAGToDAG.cpp.o                               |    1.95   |      1.90     |  -2%  |
| /libLLVMDemangle.a                                                                            |    1.11   |      1.08     |  -2%  |
| /Target/Mips/CMakeFiles/LLVMMipsCodeGen.dir/MipsInstructionSelector.cpp.o                     |    1.18   |      1.16     |  -2%  |
| /clang/13.0.0/lib/darwin/libclang_rt.lsan_osx_dynamic.dylib                                   |    1.48   |      1.46     |  -2%  |
| /Transforms/Coroutines/CMakeFiles/LLVMCoroutines.dir/CoroFrame.cpp.o                          |    1.26   |      1.24     |  -2%  |
| /Transforms/Instrumentation/CMakeFiles/LLVMInstrumentation.dir/PGOInstrumentation.cpp.o       |    1.07   |      1.05     |  -2%  |
| /clang/13.0.0/lib/darwin/libclang_rt.fuzzer_no_main_osx.a                                     |   24.62   |     24.27     |  -1%  |
| /clang/13.0.0/lib/darwin/libclang_rt.fuzzer_osx.a                                             |   24.67   |     24.33     |  -1%  |
| /libLLVMInstrumentation.a                                                                     |   10.27   |     10.13     |  -1%  |
| /ExecutionEngine/Interpreter/CMakeFiles/LLVMInterpreter.dir/Execution.cpp.o                   |    1.15   |      1.14     |  -1%  |
| /libLLVMInterpreter.a                                                                         |    1.38   |      1.37     |  -1%  |
| /Analysis/CMakeFiles/LLVMAnalysis.dir/DependenceAnalysis.cpp.o                                |    1.08   |      1.07     |  -1%  |
| /Target/X86/CMakeFiles/LLVMX86CodeGen.dir/X86InstructionSelector.cpp.o                        |    1.26   |      1.24     |  -1%  |
| /Target/X86/X86GenDisassemblerTables.inc                                                      |    7.04   |      6.97     |  -1%  |
| /IR/CMakeFiles/LLVMCore.dir/AsmWriter.cpp.o                                                   |    1.28   |      1.27     |  -1%  |
| /Object/CMakeFiles/LLVMObject.dir/ELF.cpp.o                                                   |    2.62   |      2.59     |  -1%  |
| /Target/X86/Disassembler/CMakeFiles/LLVMX86Disassembler.dir/X86Disassembler.cpp.o             |    2.33   |      2.32     |  -1%  |
| /libLLVMX86Disassembler.a                                                                     |    2.34   |      2.32     |  -1%  |
| /libclangRewriteFrontend.a                                                                    |    4.58   |      4.54     |  -1%  |
| /Transforms/Instrumentation/CMakeFiles/LLVMInstrumentation.dir/DataFlowSanitizer.cpp.o        |    1.01   |      1.00     |  -1%  |
| /Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCISelLowering.cpp.o                       |    3.39   |      3.37     |  -1%  |
| /libLLVMMipsDesc.a                                                                            |    2.75   |      2.77     |   1%  |
| /Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMInstructionSelector.cpp.o                        |    1.68   |      1.69     |   1%  |
| /Transforms/Scalar/CMakeFiles/LLVMScalarOpts.dir/LowerMatrixIntrinsics.cpp.o                  |    1.31   |      1.31     |   1%  |
| /CodeGen/GlobalISel/CMakeFiles/LLVMGlobalISel.dir/LegalizerHelper.cpp.o                       |    1.73   |      1.74     |   1%  |
| /CodeGen/GlobalISel/CMakeFiles/LLVMGlobalISel.dir/IRTranslator.cpp.o                          |    1.39   |      1.39     |   1%  |
| /Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCCodeEmitter.cpp.o        |    2.37   |      2.39     |   1%  |
| /clang/13.0.0/lib/darwin/libclang_rt.stats_osx_dynamic.dylib                                  |    1.09   |      1.10     |   1%  |
| /clang/13.0.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib                                   |    3.11   |      3.13     |   1%  |
| /Target/PowerPC/PPCGenSubtargetInfo.inc                                                       |    1.49   |      1.50     |   1%  |
| /libLLVMCoverage.a                                                                            |    1.66   |      1.67     |   1%  |
| /CodeGen/CMakeFiles/LLVMCodeGen.dir/CodeGenPrepare.cpp.o                                      |    2.73   |      2.75     |   1%  |
| /CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/SelectionDAGISel.cpp.o                  |    1.13   |      1.14     |   1%  |
| /libclangFrontend.a                                                                           |   15.12   |     15.25     |   1%  |
| /Target/X86/CMakeFiles/LLVMX86CodeGen.dir/X86ISelDAGToDAG.cpp.o                               |    2.02   |      2.04     |   1%  |
| /libclangParse.a                                                                              |    9.09   |      9.18     |   1%  |
| /libclangTidyUtils.a                                                                          |    3.79   |      3.83     |   1%  |
| /IR/CMakeFiles/LLVMCore.dir/Dominators.cpp.o                                                  |    1.49   |      1.50     |   1%  |
| /libLLVMAsmParser.a                                                                           |    2.45   |      2.48     |   1%  |
| /libclangAnalysis.a                                                                           |   12.35   |     12.48     |   1%  |
| /Transforms/Scalar/CMakeFiles/LLVMScalarOpts.dir/Reassociate.cpp.o                            |    1.10   |      1.12     |   1%  |
| /Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64InstPrinter.cpp.o          |    1.01   |      1.02     |   1%  |
| /libclangExtractAPI.a                                                                         |    3.14   |      3.18     |   1%  |
| /Transforms/Scalar/CMakeFiles/LLVMScalarOpts.dir/LoopIdiomRecognize.cpp.o                     |    1.12   |      1.13     |   1%  |
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+-----------------------------------------------------------------------------------------------+-----------+---------------+-------+

Hi, what command did you use to build the toolchain?