clang-tools  10.0.0
IndexBenchmark.cpp
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1 //===--- IndexBenchmark.cpp - Clangd index benchmarks -----------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "../index/Serialization.h"
10 #include "../index/dex/Dex.h"
11 #include "benchmark/benchmark.h"
12 #include "llvm/ADT/SmallVector.h"
13 #include "llvm/ADT/StringRef.h"
14 #include "llvm/Support/Path.h"
15 #include "llvm/Support/Regex.h"
16 #include <fstream>
17 #include <streambuf>
18 #include <string>
19 
20 const char *IndexFilename;
21 const char *RequestsFilename;
22 
23 namespace clang {
24 namespace clangd {
25 namespace {
26 
27 std::unique_ptr<SymbolIndex> buildMem() {
28  return loadIndex(IndexFilename, /*UseDex=*/false);
29 }
30 
31 std::unique_ptr<SymbolIndex> buildDex() {
32  return loadIndex(IndexFilename, /*UseDex=*/true);
33 }
34 
35 // Reads JSON array of serialized FuzzyFindRequest's from user-provided file.
36 std::vector<FuzzyFindRequest> extractQueriesFromLogs() {
37  std::ifstream InputStream(RequestsFilename);
38  std::string Log((std::istreambuf_iterator<char>(InputStream)),
39  std::istreambuf_iterator<char>());
40 
41  std::vector<FuzzyFindRequest> Requests;
42  auto JSONArray = llvm::json::parse(Log);
43 
44  // Panic if the provided file couldn't be parsed.
45  if (!JSONArray) {
46  llvm::errs() << "Error when parsing JSON requests file: "
47  << llvm::toString(JSONArray.takeError());
48  exit(1);
49  }
50  if (!JSONArray->getAsArray()) {
51  llvm::errs() << "Error: top-level value is not a JSON array: " << Log
52  << '\n';
53  exit(1);
54  }
55 
56  for (const auto &Item : *JSONArray->getAsArray()) {
57  FuzzyFindRequest Request;
58  // Panic if the provided file couldn't be parsed.
59  if (!fromJSON(Item, Request)) {
60  llvm::errs() << "Error when deserializing request: " << Item << '\n';
61  exit(1);
62  }
63  Requests.push_back(Request);
64  }
65  return Requests;
66 }
67 
68 static void MemQueries(benchmark::State &State) {
69  const auto Mem = buildMem();
70  const auto Requests = extractQueriesFromLogs();
71  for (auto _ : State)
72  for (const auto &Request : Requests)
73  Mem->fuzzyFind(Request, [](const Symbol &S) {});
74 }
75 BENCHMARK(MemQueries);
76 
77 static void DexQueries(benchmark::State &State) {
78  const auto Dex = buildDex();
79  const auto Requests = extractQueriesFromLogs();
80  for (auto _ : State)
81  for (const auto &Request : Requests)
82  Dex->fuzzyFind(Request, [](const Symbol &S) {});
83 }
84 BENCHMARK(DexQueries);
85 
86 } // namespace
87 } // namespace clangd
88 } // namespace clang
89 
90 // FIXME(kbobyrev): Add index building time benchmarks.
91 // FIXME(kbobyrev): Add memory consumption "benchmarks" by manually measuring
92 // in-memory index size and reporting it as time.
93 // FIXME(kbobyrev): Create a logger wrapper to suppress debugging info printer.
94 int main(int argc, char *argv[]) {
95  if (argc < 3) {
96  llvm::errs() << "Usage: " << argv[0]
97  << " global-symbol-index.yaml requests.json "
98  "BENCHMARK_OPTIONS...\n";
99  return -1;
100  }
101  IndexFilename = argv[1];
102  RequestsFilename = argv[2];
103  // Trim first two arguments of the benchmark invocation and pretend no
104  // arguments were passed in the first place.
105  argv[2] = argv[0];
106  argv += 2;
107  argc -= 2;
108  ::benchmark::Initialize(&argc, argv);
109  ::benchmark::RunSpecifiedBenchmarks();
110 }
std::unique_ptr< SymbolIndex > loadIndex(llvm::StringRef SymbolFilename, bool UseDex)
int main(int argc, char *argv[])
const char * RequestsFilename
static llvm::StringRef toString(SpecialMemberFunctionsCheck::SpecialMemberFunctionKind K)
bool fromJSON(const llvm::json::Value &Parameters, FuzzyFindRequest &Request)
Definition: Index.cpp:34
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
const char * IndexFilename