forked from OSchip/llvm-project
b0572abf72
Some larger projects were loading quite slowly with the current LLDB on macOS and macOS simulator builds. I did some instrument traces and found 3 main culprits: - a LLDB timer that was put into a function that was called too often - a std::set that was keeping track of the address of symbols that were already added - a unnamed function generator in ObjectFile that was going slow due to allocations In order to see this in action I ran the latest LLDB on a large application with many frameworks using the following method: (lldb) script import time; start_time = time.perf_counter() (lldb) file Large.app (lldb) script print(time.perf_counter() - start_time) I first range "sudo purge" to clear the system file caches to simulate a cold startup of the debugger, followed by two iterations with warm file caches. Prior to this fix I was seeing the following timings: 17.68 (cold) 14.56 (warm 1) 14.52 (warm 2) After this fix I was seeing: 11.32 (cold) 8.43 (warm 1) 8.49 (warm 2) Differential Revision: https://reviews.llvm.org/D103504 |
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| .. | ||
| ArmUnwindInfo.cpp | ||
| Block.cpp | ||
| CMakeLists.txt | ||
| CompactUnwindInfo.cpp | ||
| CompileUnit.cpp | ||
| CompilerDecl.cpp | ||
| CompilerDeclContext.cpp | ||
| CompilerType.cpp | ||
| DWARFCallFrameInfo.cpp | ||
| DebugMacros.cpp | ||
| DeclVendor.cpp | ||
| FuncUnwinders.cpp | ||
| Function.cpp | ||
| LineEntry.cpp | ||
| LineTable.cpp | ||
| LocateSymbolFile.cpp | ||
| LocateSymbolFileMacOSX.cpp | ||
| ObjectFile.cpp | ||
| PostfixExpression.cpp | ||
| Symbol.cpp | ||
| SymbolContext.cpp | ||
| SymbolFile.cpp | ||
| SymbolVendor.cpp | ||
| Symtab.cpp | ||
| Type.cpp | ||
| TypeList.cpp | ||
| TypeMap.cpp | ||
| TypeSystem.cpp | ||
| UnwindPlan.cpp | ||
| UnwindTable.cpp | ||
| Variable.cpp | ||
| VariableList.cpp | ||