v8/tools/parser-shell.cc

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// Copyright 2014 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <vector>
#include "v8.h"
#include "api.h"
#include "compiler.h"
#include "scanner-character-streams.h"
#include "shell-utils.h"
#include "parser.h"
#include "preparse-data-format.h"
#include "preparse-data.h"
#include "preparser.h"
using namespace v8::internal;
enum TestMode {
PreParseAndParse,
PreParse,
Parse
};
std::pair<TimeDelta, TimeDelta> RunBaselineParser(
const char* fname, Encoding encoding, int repeat, v8::Isolate* isolate,
v8::Handle<v8::Context> context, TestMode test_mode) {
int length = 0;
const byte* source = ReadFileAndRepeat(fname, &length, repeat);
v8::Handle<v8::String> source_handle;
switch (encoding) {
case UTF8: {
source_handle = v8::String::NewFromUtf8(
isolate, reinterpret_cast<const char*>(source));
break;
}
case UTF16: {
source_handle = v8::String::NewFromTwoByte(
isolate, reinterpret_cast<const uint16_t*>(source),
v8::String::kNormalString, length / 2);
break;
}
case LATIN1: {
source_handle = v8::String::NewFromOneByte(isolate, source);
break;
}
}
v8::ScriptData* cached_data = NULL;
TimeDelta preparse_time, parse_time;
if (test_mode == PreParseAndParse || test_mode == PreParse) {
ElapsedTimer timer;
timer.Start();
cached_data = v8::ScriptData::PreCompile(source_handle);
preparse_time = timer.Elapsed();
if (cached_data == NULL || cached_data->HasError()) {
fprintf(stderr, "Preparsing failed\n");
return std::make_pair(TimeDelta(), TimeDelta());
}
}
if (test_mode == PreParseAndParse || test_mode == Parse) {
Handle<String> str = v8::Utils::OpenHandle(*source_handle);
i::Isolate* internal_isolate = str->GetIsolate();
Handle<Script> script = internal_isolate->factory()->NewScript(str);
CompilationInfoWithZone info(script);
info.MarkAsGlobal();
i::ScriptDataImpl* cached_data_impl =
static_cast<i::ScriptDataImpl*>(cached_data);
if (test_mode == PreParseAndParse) {
info.SetCachedData(&cached_data_impl,
i::CONSUME_CACHED_DATA);
}
info.SetContext(v8::Utils::OpenHandle(*context));
ElapsedTimer timer;
timer.Start();
// Allow lazy parsing; otherwise the preparse data won't help.
bool success = Parser::Parse(&info, true);
parse_time = timer.Elapsed();
if (!success) {
fprintf(stderr, "Parsing failed\n");
return std::make_pair(TimeDelta(), TimeDelta());
}
}
return std::make_pair(preparse_time, parse_time);
}
int main(int argc, char* argv[]) {
v8::V8::InitializeICU();
v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
Encoding encoding = LATIN1;
TestMode test_mode = PreParseAndParse;
std::vector<std::string> fnames;
std::string benchmark;
int repeat = 1;
for (int i = 0; i < argc; ++i) {
if (strcmp(argv[i], "--latin1") == 0) {
encoding = LATIN1;
} else if (strcmp(argv[i], "--utf8") == 0) {
encoding = UTF8;
} else if (strcmp(argv[i], "--utf16") == 0) {
encoding = UTF16;
} else if (strcmp(argv[i], "--preparse-and-parse") == 0) {
test_mode = PreParseAndParse;
} else if (strcmp(argv[i], "--preparse") == 0) {
test_mode = PreParse;
} else if (strcmp(argv[i], "--parse") == 0) {
test_mode = Parse;
} else if (strncmp(argv[i], "--benchmark=", 12) == 0) {
benchmark = std::string(argv[i]).substr(12);
} else if (strncmp(argv[i], "--repeat=", 9) == 0) {
std::string repeat_str = std::string(argv[i]).substr(9);
repeat = atoi(repeat_str.c_str());
} else if (i > 0 && argv[i][0] != '-') {
fnames.push_back(std::string(argv[i]));
}
}
v8::Isolate* isolate = v8::Isolate::GetCurrent();
{
v8::HandleScope handle_scope(isolate);
v8::Handle<v8::ObjectTemplate> global = v8::ObjectTemplate::New(isolate);
v8::Local<v8::Context> context = v8::Context::New(isolate, NULL, global);
ASSERT(!context.IsEmpty());
{
v8::Context::Scope scope(context);
double preparse_total = 0;
double parse_total = 0;
for (size_t i = 0; i < fnames.size(); i++) {
std::pair<TimeDelta, TimeDelta> time = RunBaselineParser(
fnames[i].c_str(), encoding, repeat, isolate, context, test_mode);
preparse_total += time.first.InMillisecondsF();
parse_total += time.second.InMillisecondsF();
}
if (benchmark.empty()) benchmark = "Baseline";
printf("%s(PreParseRunTime): %.f ms\n", benchmark.c_str(),
preparse_total);
printf("%s(ParseRunTime): %.f ms\n", benchmark.c_str(), parse_total);
printf("%s(RunTime): %.f ms\n", benchmark.c_str(),
preparse_total + parse_total);
}
}
v8::V8::Dispose();
return 0;
}