diff options
Diffstat (limited to 'lib/Support/Allocator.cpp')
| -rw-r--r-- | lib/Support/Allocator.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Support/Allocator.cpp b/lib/Support/Allocator.cpp index 90df262336..02b45d8af9 100644 --- a/lib/Support/Allocator.cpp +++ b/lib/Support/Allocator.cpp @@ -44,6 +44,12 @@ char *BumpPtrAllocator::AlignPtr(char *Ptr, size_t Alignment) { /// StartNewSlab - Allocate a new slab and move the bump pointers over into /// the new slab. Modifies CurPtr and End. void BumpPtrAllocator::StartNewSlab() { + // If we allocated a big number of slabs already it's likely that we're going + // to allocate more. Increase slab size to reduce mallocs and possibly memory + // overhead. The factors are chosen conservatively to avoid overallocation. + if (BytesAllocated >= SlabSize * 128) + SlabSize *= 2; + MemSlab *NewSlab = Allocator.Allocate(SlabSize); NewSlab->NextPtr = CurSlab; CurSlab = NewSlab; |