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Bug 1263953 - Reduce the growth rate of Pickle. r=wmccloskey

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This commit is contained in:
Gabor Krizsanits 2016-04-21 15:09:35 +02:00
parent 8ac1e51406
commit ed1fa0cf48
1 changed files with 4 additions and 1 deletions
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5
ipc/chromium/src/base/pickle.cc
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@ -24,6 +24,8 @@ static_assert(MOZ_ALIGNOF(Pickle::memberAlignmentType) >= MOZ_ALIGNOF(uint32_t),
// static
const int Pickle::kPayloadUnit = 64;
const uint32_t kFastGrowthCap = 128 * 1024;
// We mark a read only pickle with a special capacity_.
static const uint32_t kCapacityReadOnly = (uint32_t) -1;
@ -500,7 +502,8 @@ char* Pickle::BeginWrite(uint32_t length, uint32_t alignment) {
uint32_t needed_size = header_size_ + new_size;
if (needed_size > capacity_) {
Resize(std::max(capacity_ * 2, needed_size));
double growth_rate = capacity_ < kFastGrowthCap ? 2.0 : 1.4;
Resize(std::max(static_cast<uint32_t>(capacity_ * growth_rate), needed_size));
}
DCHECK(intptr_t(header_) % alignment == 0);