1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
| //===- YAMLBench - Benchmark the YAMLParser implementation ----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This program executes the YAMLParser on differently sized YAML texts and
// outputs the run time.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/YAMLParser.h"
#include "llvm/Support/raw_ostream.h"
#include <system_error>
using namespace llvm;
static cl::opt<bool>
DumpTokens( "tokens"
, cl::desc("Print the tokenization of the file.")
, cl::init(false)
);
static cl::opt<bool>
DumpCanonical( "canonical"
, cl::desc("Print the canonical YAML for this file.")
, cl::init(false)
);
static cl::opt<std::string>
Input(cl::Positional, cl::desc("<input>"));
static cl::opt<bool>
Verify( "verify"
, cl::desc(
"Run a quick verification useful for regression testing")
, cl::init(false)
);
static cl::opt<unsigned>
MemoryLimitMB("memory-limit", cl::desc(
"Do not use more megabytes of memory"),
cl::init(1000));
cl::opt<cl::boolOrDefault>
UseColor("use-color", cl::desc("Emit colored output (default=autodetect)"),
cl::init(cl::BOU_UNSET));
struct indent {
unsigned distance;
indent(unsigned d) : distance(d) {}
};
static raw_ostream &operator <<(raw_ostream &os, const indent &in) {
for (unsigned i = 0; i < in.distance; ++i)
os << " ";
return os;
}
/// Pretty print a tag by replacing tag:yaml.org,2002: with !!.
static std::string prettyTag(yaml::Node *N) {
std::string Tag = N->getVerbatimTag();
if (StringRef(Tag).startswith("tag:yaml.org,2002:")) {
std::string Ret = "!!";
Ret += StringRef(Tag).substr(18);
return Ret;
}
std::string Ret = "!<";
Ret += Tag;
Ret += ">";
return Ret;
}
static void dumpNode( yaml::Node *n
, unsigned Indent = 0
, bool SuppressFirstIndent = false) {
if (!n)
return;
if (!SuppressFirstIndent)
outs() << indent(Indent);
StringRef Anchor = n->getAnchor();
if (!Anchor.empty())
outs() << "&" << Anchor << " ";
if (yaml::ScalarNode *sn = dyn_cast<yaml::ScalarNode>(n)) {
SmallString<32> Storage;
StringRef Val = sn->getValue(Storage);
outs() << prettyTag(n) << " \"" << yaml::escape(Val) << "\"";
} else if (yaml::BlockScalarNode *BN = dyn_cast<yaml::BlockScalarNode>(n)) {
outs() << prettyTag(n) << " \"" << yaml::escape(BN->getValue()) << "\"";
} else if (yaml::SequenceNode *sn = dyn_cast<yaml::SequenceNode>(n)) {
outs() << prettyTag(n) << " [\n";
++Indent;
for (yaml::SequenceNode::iterator i = sn->begin(), e = sn->end();
i != e; ++i) {
dumpNode(i, Indent);
outs() << ",\n";
}
--Indent;
outs() << indent(Indent) << "]";
} else if (yaml::MappingNode *mn = dyn_cast<yaml::MappingNode>(n)) {
outs() << prettyTag(n) << " {\n";
++Indent;
for (yaml::MappingNode::iterator i = mn->begin(), e = mn->end();
i != e; ++i) {
outs() << indent(Indent) << "? ";
dumpNode(i->getKey(), Indent, true);
outs() << "\n";
outs() << indent(Indent) << ": ";
dumpNode(i->getValue(), Indent, true);
outs() << ",\n";
}
--Indent;
outs() << indent(Indent) << "}";
} else if (yaml::AliasNode *an = dyn_cast<yaml::AliasNode>(n)){
outs() << "*" << an->getName();
} else if (isa<yaml::NullNode>(n)) {
outs() << prettyTag(n) << " null";
}
}
static void dumpStream(yaml::Stream &stream) {
for (yaml::document_iterator di = stream.begin(), de = stream.end(); di != de;
++di) {
outs() << "%YAML 1.2\n"
<< "---\n";
yaml::Node *n = di->getRoot();
if (n)
dumpNode(n);
else
break;
outs() << "\n...\n";
}
}
static void benchmark(llvm::TimerGroup &Group, llvm::StringRef Name,
llvm::StringRef Description, llvm::StringRef JSONText) {
llvm::Timer BaseLine((Name + ".loop").str(), (Description + ": Loop").str(),
Group);
BaseLine.startTimer();
char C = 0;
for (llvm::StringRef::iterator I = JSONText.begin(),
E = JSONText.end();
I != E; ++I) { C += *I; }
BaseLine.stopTimer();
volatile char DontOptimizeOut = C; (void)DontOptimizeOut;
llvm::Timer Tokenizing((Name + ".tokenizing").str(),
(Description + ": Tokenizing").str(), Group);
Tokenizing.startTimer();
{
yaml::scanTokens(JSONText);
}
Tokenizing.stopTimer();
llvm::Timer Parsing((Name + ".parsing").str(),
(Description + ": Parsing").str(), Group);
Parsing.startTimer();
{
llvm::SourceMgr SM;
llvm::yaml::Stream stream(JSONText, SM);
stream.skip();
}
Parsing.stopTimer();
}
static std::string createJSONText(size_t MemoryMB, unsigned ValueSize) {
std::string JSONText;
llvm::raw_string_ostream Stream(JSONText);
Stream << "[\n";
size_t 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"
<< " }";
Stream.flush();
if (JSONText.size() < MemoryBytes) Stream << ",";
Stream << "\n";
}
Stream << "]\n";
Stream.flush();
return JSONText;
}
int main(int argc, char **argv) {
llvm::cl::ParseCommandLineOptions(argc, argv);
bool ShowColors = UseColor == cl::BOU_UNSET
? sys::Process::StandardOutHasColors()
: UseColor == cl::BOU_TRUE;
if (Input.getNumOccurrences()) {
ErrorOr<std::unique_ptr<MemoryBuffer>> BufOrErr =
MemoryBuffer::getFileOrSTDIN(Input);
if (!BufOrErr)
return 1;
MemoryBuffer &Buf = *BufOrErr.get();
llvm::SourceMgr sm;
if (DumpTokens) {
yaml::dumpTokens(Buf.getBuffer(), outs());
}
if (DumpCanonical) {
yaml::Stream stream(Buf.getBuffer(), sm, ShowColors);
dumpStream(stream);
if (stream.failed())
return 1;
}
}
if (Verify) {
llvm::TimerGroup Group("yaml", "YAML parser benchmark");
benchmark(Group, "Fast", "Fast", createJSONText(10, 500));
} else if (!DumpCanonical && !DumpTokens) {
llvm::TimerGroup Group("yaml", "YAML parser benchmark");
benchmark(Group, "Small", "Small Values", createJSONText(MemoryLimitMB, 5));
benchmark(Group, "Medium", "Medium Values",
createJSONText(MemoryLimitMB, 500));
benchmark(Group, "Large", "Large Values",
createJSONText(MemoryLimitMB, 50000));
}
return 0;
}
|