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Adds a flag to allow specifying the memory limitations of the JSON benchmark.

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llvm-svn: 146863
This commit is contained in:
Manuel Klimek 2011-12-19 09:32:05 +00:00
parent b62af984a1
commit 99a78498c5
1 changed files with 14 additions and 7 deletions
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21
utils/json-bench/JSONBench.cpp
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@ -23,6 +23,11 @@ Verify("verify", llvm::cl::desc(
"Run a quick verification useful for regression testing"),
llvm::cl::init(false));
static llvm::cl::opt<unsigned>
MemoryLimitMB("memory-limit", llvm::cl::desc(
"Do not use more megabytes of memory"),
llvm::cl::init(1000));
void benchmark(llvm::TimerGroup &Group, llvm::StringRef Name,
llvm::StringRef JSONText) {
llvm::Timer BaseLine((Name + ": Loop").str(), Group);
@ -44,17 +49,19 @@ void benchmark(llvm::TimerGroup &Group, llvm::StringRef Name,
Parsing.stopTimer();
}
std::string createJSONText(int N, int ValueSize) {
std::string createJSONText(unsigned MemoryMB, unsigned ValueSize) {
std::string JSONText;
llvm::raw_string_ostream Stream(JSONText);
Stream << "[\n";
for (int I = 0; I < N; ++I) {
unsigned MemoryBytes = MemoryMB * 1024 * 1024;
while (JSONText.size() < MemoryBytes) {
Stream << " {\n"
<< " \"key1\": \"" << std::string(ValueSize, '*') << "\",\n"
<< " \"key2\": \"" << std::string(ValueSize, '*') << "\",\n"
<< " \"key3\": \"" << std::string(ValueSize, '*') << "\"\n"
<< " }";
if (I + 1 < N) Stream << ",";
Stream.flush();
if (JSONText.size() < MemoryBytes) Stream << ",";
Stream << "\n";
}
Stream << "]\n";
@ -66,11 +73,11 @@ int main(int argc, char **argv) {
llvm::cl::ParseCommandLineOptions(argc, argv);
llvm::TimerGroup Group("JSON parser benchmark");
if (Verify) {
benchmark(Group, "Fast", createJSONText(1000, 500));
benchmark(Group, "Fast", createJSONText(10, 500));
} else {
benchmark(Group, "Small Values", createJSONText(1000000, 5));
benchmark(Group, "Medium Values", createJSONText(1000000, 500));
benchmark(Group, "Large Values", createJSONText(10000, 50000));
benchmark(Group, "Small Values", createJSONText(MemoryLimitMB, 5));
benchmark(Group, "Medium Values", createJSONText(MemoryLimitMB, 500));
benchmark(Group, "Large Values", createJSONText(MemoryLimitMB, 50000));
}
return 0;
}