1 //===- YAMLBench - Benchmark the YAMLParser implementation ----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This program executes the YAMLParser on differently sized YAML texts and
11 // outputs the run time.
13 //===----------------------------------------------------------------------===//
16 #include "llvm/ADT/SmallString.h"
17 #include "llvm/Support/Casting.h"
18 #include "llvm/Support/CommandLine.h"
19 #include "llvm/Support/MemoryBuffer.h"
20 #include "llvm/Support/SourceMgr.h"
21 #include "llvm/Support/Timer.h"
22 #include "llvm/Support/Process.h"
23 #include "llvm/Support/YAMLParser.h"
24 #include "llvm/Support/raw_ostream.h"
25 #include <system_error>
31 , cl::desc("Print the tokenization of the file.")
36 DumpCanonical( "canonical"
37 , cl::desc("Print the canonical YAML for this file.")
41 static cl::opt<std::string>
42 Input(cl::Positional, cl::desc("<input>"));
47 "Run a quick verification useful for regression testing")
51 static cl::opt<unsigned>
52 MemoryLimitMB("memory-limit", cl::desc(
53 "Do not use more megabytes of memory"),
56 cl::opt<cl::boolOrDefault>
57 UseColor("use-color", cl::desc("Emit colored output (default=autodetect)"),
58 cl::init(cl::BOU_UNSET));
62 indent(unsigned d) : distance(d) {}
65 static raw_ostream &operator <<(raw_ostream &os, const indent &in) {
66 for (unsigned i = 0; i < in.distance; ++i)
71 /// \brief Pretty print a tag by replacing tag:yaml.org,2002: with !!.
72 static std::string prettyTag(yaml::Node *N) {
73 std::string Tag = N->getVerbatimTag();
74 if (StringRef(Tag).startswith("tag:yaml.org,2002:")) {
75 std::string Ret = "!!";
76 Ret += StringRef(Tag).substr(18);
79 std::string Ret = "!<";
85 static void dumpNode( yaml::Node *n
87 , bool SuppressFirstIndent = false) {
90 if (!SuppressFirstIndent)
91 outs() << indent(Indent);
92 StringRef Anchor = n->getAnchor();
94 outs() << "&" << Anchor << " ";
95 if (yaml::ScalarNode *sn = dyn_cast<yaml::ScalarNode>(n)) {
96 SmallString<32> Storage;
97 StringRef Val = sn->getValue(Storage);
98 outs() << prettyTag(n) << " \"" << yaml::escape(Val) << "\"";
99 } else if (yaml::BlockScalarNode *BN = dyn_cast<yaml::BlockScalarNode>(n)) {
100 outs() << prettyTag(n) << " \"" << yaml::escape(BN->getValue()) << "\"";
101 } else if (yaml::SequenceNode *sn = dyn_cast<yaml::SequenceNode>(n)) {
102 outs() << prettyTag(n) << " [\n";
104 for (yaml::SequenceNode::iterator i = sn->begin(), e = sn->end();
110 outs() << indent(Indent) << "]";
111 } else if (yaml::MappingNode *mn = dyn_cast<yaml::MappingNode>(n)) {
112 outs() << prettyTag(n) << " {\n";
114 for (yaml::MappingNode::iterator i = mn->begin(), e = mn->end();
116 outs() << indent(Indent) << "? ";
117 dumpNode(i->getKey(), Indent, true);
119 outs() << indent(Indent) << ": ";
120 dumpNode(i->getValue(), Indent, true);
124 outs() << indent(Indent) << "}";
125 } else if (yaml::AliasNode *an = dyn_cast<yaml::AliasNode>(n)){
126 outs() << "*" << an->getName();
127 } else if (isa<yaml::NullNode>(n)) {
128 outs() << prettyTag(n) << " null";
132 static void dumpStream(yaml::Stream &stream) {
133 for (yaml::document_iterator di = stream.begin(), de = stream.end(); di != de;
135 outs() << "%YAML 1.2\n"
137 yaml::Node *n = di->getRoot();
146 static void benchmark( llvm::TimerGroup &Group
147 , llvm::StringRef Name
148 , llvm::StringRef JSONText) {
149 llvm::Timer BaseLine((Name + ": Loop").str(), Group);
150 BaseLine.startTimer();
152 for (llvm::StringRef::iterator I = JSONText.begin(),
154 I != E; ++I) { C += *I; }
155 BaseLine.stopTimer();
156 volatile char DontOptimizeOut = C; (void)DontOptimizeOut;
158 llvm::Timer Tokenizing((Name + ": Tokenizing").str(), Group);
159 Tokenizing.startTimer();
161 yaml::scanTokens(JSONText);
163 Tokenizing.stopTimer();
165 llvm::Timer Parsing((Name + ": Parsing").str(), Group);
166 Parsing.startTimer();
169 llvm::yaml::Stream stream(JSONText, SM);
175 static std::string createJSONText(size_t MemoryMB, unsigned ValueSize) {
176 std::string JSONText;
177 llvm::raw_string_ostream Stream(JSONText);
179 size_t MemoryBytes = MemoryMB * 1024 * 1024;
180 while (JSONText.size() < MemoryBytes) {
182 << " \"key1\": \"" << std::string(ValueSize, '*') << "\",\n"
183 << " \"key2\": \"" << std::string(ValueSize, '*') << "\",\n"
184 << " \"key3\": \"" << std::string(ValueSize, '*') << "\"\n"
187 if (JSONText.size() < MemoryBytes) Stream << ",";
195 int main(int argc, char **argv) {
196 llvm::cl::ParseCommandLineOptions(argc, argv);
197 bool ShowColors = UseColor == cl::BOU_UNSET
198 ? sys::Process::StandardOutHasColors()
199 : UseColor == cl::BOU_TRUE;
200 if (Input.getNumOccurrences()) {
201 ErrorOr<std::unique_ptr<MemoryBuffer>> BufOrErr =
202 MemoryBuffer::getFileOrSTDIN(Input);
205 MemoryBuffer &Buf = *BufOrErr.get();
209 yaml::dumpTokens(Buf.getBuffer(), outs());
213 yaml::Stream stream(Buf.getBuffer(), sm, ShowColors);
221 llvm::TimerGroup Group("YAML parser benchmark");
222 benchmark(Group, "Fast", createJSONText(10, 500));
223 } else if (!DumpCanonical && !DumpTokens) {
224 llvm::TimerGroup Group("YAML parser benchmark");
225 benchmark(Group, "Small Values", createJSONText(MemoryLimitMB, 5));
226 benchmark(Group, "Medium Values", createJSONText(MemoryLimitMB, 500));
227 benchmark(Group, "Large Values", createJSONText(MemoryLimitMB, 50000));