348 lines
10 KiB
C++
348 lines
10 KiB
C++
#include "simdjson/jsonparser.h"
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#include <algorithm>
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#include <unistd.h>
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#include <vector>
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#include "benchmark.h"
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// #define RAPIDJSON_SSE2 // bad for performance
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// #define RAPIDJSON_SSE42 // bad for performance
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#include "rapidjson/document.h"
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#include "rapidjson/reader.h"
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#include "rapidjson/stringbuffer.h"
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#include "rapidjson/writer.h"
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#include "sajson.h"
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using namespace rapidjson;
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bool equals(const char *s1, const char *s2) { return strcmp(s1, s2) == 0; }
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void remove_duplicates(std::vector<int64_t> &v) {
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std::sort(v.begin(), v.end());
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auto last = std::unique(v.begin(), v.end());
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v.erase(last, v.end());
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}
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void print_vec(const std::vector<int64_t> &v) {
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for (auto i : v) {
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std::cout << i << " ";
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}
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std::cout << std::endl;
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}
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void simdjson_scan(std::vector<int64_t> &answer,
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simdjson::ParsedJson::Iterator &i) {
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while (i.move_forward()) {
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if (i.get_scope_type() == '{') {
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bool found_user = (i.get_string_length() == 4) &&
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(memcmp(i.get_string(), "user", 4) == 0);
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i.move_to_value();
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if (found_user) {
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if (i.is_object() && i.move_to_key("id", 2)) {
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if (i.is_integer()) {
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answer.push_back(i.get_integer());
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}
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i.up();
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}
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}
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}
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}
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}
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__attribute__((noinline)) std::vector<int64_t>
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simdjson_just_dom(simdjson::ParsedJson &pj) {
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std::vector<int64_t> answer;
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simdjson::ParsedJson::Iterator i(pj);
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simdjson_scan(answer, i);
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remove_duplicates(answer);
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return answer;
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}
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__attribute__((noinline)) std::vector<int64_t>
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simdjson_compute_stats(const simdjson::padded_string &p) {
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std::vector<int64_t> answer;
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simdjson::ParsedJson pj = simdjson::build_parsed_json(p);
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if (!pj.is_valid()) {
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return answer;
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}
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simdjson::ParsedJson::Iterator i(pj);
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simdjson_scan(answer, i);
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remove_duplicates(answer);
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return answer;
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}
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__attribute__((noinline)) bool
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simdjson_just_parse(const simdjson::padded_string &p) {
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simdjson::ParsedJson pj = simdjson::build_parsed_json(p);
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bool answer = !pj.is_valid();
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return answer;
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}
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void sajson_traverse(std::vector<int64_t> &answer, const sajson::value &node) {
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using namespace sajson;
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switch (node.get_type()) {
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case TYPE_ARRAY: {
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auto length = node.get_length();
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for (size_t i = 0; i < length; ++i) {
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sajson_traverse(answer, node.get_array_element(i));
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}
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break;
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}
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case TYPE_OBJECT: {
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auto length = node.get_length();
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// sajson has O(log n) find_object_key, but we still visit each node anyhow
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// because we need to visit all values.
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for (auto i = 0u; i < length; ++i) {
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auto key = node.get_object_key(i); // expected: sajson::string
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bool found_user =
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(key.length() == 4) && (memcmp(key.data(), "user", 4) == 0);
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if (found_user) { // found a user!!!
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auto user_value = node.get_object_value(i); // get the value
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if (user_value.get_type() ==
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TYPE_OBJECT) { // the value should be an object
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// now we know that we only need one value
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auto user_value_length = user_value.get_length();
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auto right_index =
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user_value.find_object_key(sajson::string("id", 2));
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if (right_index < user_value_length) {
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auto v = user_value.get_object_value(right_index);
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if (v.get_type() == TYPE_INTEGER) { // check that it is an integer
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answer.push_back(v.get_integer_value()); // record it!
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} else if (v.get_type() == TYPE_DOUBLE) {
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answer.push_back((int64_t)v.get_double_value()); // record it!
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}
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}
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}
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}
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sajson_traverse(answer, node.get_object_value(i));
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}
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break;
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}
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case TYPE_NULL:
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case TYPE_FALSE:
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case TYPE_TRUE:
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case TYPE_STRING:
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case TYPE_DOUBLE:
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case TYPE_INTEGER:
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break;
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default:
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assert(false && "unknown node type");
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}
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}
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__attribute__((noinline)) std::vector<int64_t>
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sasjon_just_dom(sajson::document &d) {
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std::vector<int64_t> answer;
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sajson_traverse(answer, d.get_root());
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remove_duplicates(answer);
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return answer;
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}
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__attribute__((noinline)) std::vector<int64_t>
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sasjon_compute_stats(const simdjson::padded_string &p) {
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std::vector<int64_t> answer;
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char *buffer = (char *)malloc(p.size());
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memcpy(buffer, p.data(), p.size());
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auto d = sajson::parse(sajson::dynamic_allocation(),
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sajson::mutable_string_view(p.size(), buffer));
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if (!d.is_valid()) {
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free(buffer);
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return answer;
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}
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sajson_traverse(answer, d.get_root());
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free(buffer);
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remove_duplicates(answer);
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return answer;
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}
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__attribute__((noinline)) bool
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sasjon_just_parse(const simdjson::padded_string &p) {
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char *buffer = (char *)malloc(p.size());
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memcpy(buffer, p.data(), p.size());
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auto d = sajson::parse(sajson::dynamic_allocation(),
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sajson::mutable_string_view(p.size(), buffer));
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bool answer = !d.is_valid();
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free(buffer);
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return answer;
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}
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void rapid_traverse(std::vector<int64_t> &answer, const rapidjson::Value &v) {
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switch (v.GetType()) {
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case kObjectType:
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for (Value::ConstMemberIterator m = v.MemberBegin(); m != v.MemberEnd();
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++m) {
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bool found_user = (m->name.GetStringLength() == 4) &&
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(memcmp(m->name.GetString(), "user", 4) == 0);
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if (found_user) {
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const rapidjson::Value &child = m->value;
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if (child.GetType() == kObjectType) {
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for (Value::ConstMemberIterator k = child.MemberBegin();
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k != child.MemberEnd(); ++k) {
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if (equals(k->name.GetString(), "id")) {
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const rapidjson::Value &val = k->value;
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if (val.GetType() == kNumberType) {
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answer.push_back(val.GetInt64());
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}
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}
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}
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}
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}
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rapid_traverse(answer, m->value);
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}
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break;
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case kArrayType:
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for (Value::ConstValueIterator i = v.Begin(); i != v.End();
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++i) { // v.Size();
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rapid_traverse(answer, *i);
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}
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break;
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case kNullType:
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case kFalseType:
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case kTrueType:
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case kStringType:
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case kNumberType:
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default:
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break;
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}
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}
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__attribute__((noinline)) std::vector<int64_t>
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rapid_just_dom(rapidjson::Document &d) {
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std::vector<int64_t> answer;
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rapid_traverse(answer, d);
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remove_duplicates(answer);
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return answer;
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}
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__attribute__((noinline)) std::vector<int64_t>
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rapid_compute_stats(const simdjson::padded_string &p) {
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std::vector<int64_t> answer;
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char *buffer = (char *)malloc(p.size() + 1);
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memcpy(buffer, p.data(), p.size());
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buffer[p.size()] = '\0';
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rapidjson::Document d;
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d.ParseInsitu<kParseValidateEncodingFlag>(buffer);
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if (d.HasParseError()) {
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free(buffer);
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return answer;
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}
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rapid_traverse(answer, d);
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free(buffer);
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remove_duplicates(answer);
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return answer;
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}
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__attribute__((noinline)) bool
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rapid_just_parse(const simdjson::padded_string &p) {
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char *buffer = (char *)malloc(p.size() + 1);
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memcpy(buffer, p.data(), p.size());
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buffer[p.size()] = '\0';
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rapidjson::Document d;
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d.ParseInsitu<kParseValidateEncodingFlag>(buffer);
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bool answer = d.HasParseError();
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free(buffer);
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return answer;
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}
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int main(int argc, char *argv[]) {
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bool verbose = false;
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bool just_data = false;
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int c;
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while ((c = getopt(argc, argv, "vt")) != -1)
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switch (c) {
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case 't':
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just_data = true;
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break;
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case 'v':
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verbose = true;
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break;
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default:
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abort();
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}
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if (optind >= argc) {
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std::cerr
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<< "Using different parsers, we compute the content statistics of "
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"JSON documents."
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<< std::endl;
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std::cerr << "Usage: " << argv[0] << " <jsonfile>" << std::endl;
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std::cerr << "Or " << argv[0] << " -v <jsonfile>" << std::endl;
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exit(1);
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}
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const char *filename = argv[optind];
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if (optind + 1 < argc) {
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std::cerr << "warning: ignoring everything after " << argv[optind + 1]
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<< std::endl;
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}
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simdjson::padded_string p;
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try {
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simdjson::get_corpus(filename).swap(p);
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} catch (const std::exception &e) { // caught by reference to base
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std::cout << "Could not load the file " << filename << std::endl;
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return EXIT_FAILURE;
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}
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if (verbose) {
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std::cout << "Input has ";
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if (p.size() > 1024 * 1024)
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std::cout << p.size() / (1024 * 1024) << " MB ";
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else if (p.size() > 1024)
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std::cout << p.size() / 1024 << " KB ";
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else
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std::cout << p.size() << " B ";
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std::cout << std::endl;
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}
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std::vector<int64_t> s1 = simdjson_compute_stats(p);
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if (verbose) {
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printf("simdjson: ");
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print_vec(s1);
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}
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std::vector<int64_t> s2 = rapid_compute_stats(p);
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if (verbose) {
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printf("rapid: ");
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print_vec(s2);
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}
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std::vector<int64_t> s3 = sasjon_compute_stats(p);
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if (verbose) {
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printf("sasjon: ");
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print_vec(s3);
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}
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assert(s1 == s2);
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assert(s1 == s3);
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size_t size = s1.size();
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int repeat = 500;
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int volume = p.size();
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if (just_data) {
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printf(
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"name cycles_per_byte cycles_per_byte_err gb_per_s gb_per_s_err \n");
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}
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BEST_TIME("simdjson ", simdjson_compute_stats(p).size(), size, , repeat,
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volume, !just_data);
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BEST_TIME("rapid ", rapid_compute_stats(p).size(), size, , repeat, volume,
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!just_data);
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BEST_TIME("sasjon ", sasjon_compute_stats(p).size(), size, , repeat, volume,
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!just_data);
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BEST_TIME("simdjson (just parse) ", simdjson_just_parse(p), false, , repeat,
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volume, !just_data);
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BEST_TIME("rapid (just parse) ", rapid_just_parse(p), false, , repeat,
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volume, !just_data);
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BEST_TIME("sasjon (just parse) ", sasjon_just_parse(p), false, , repeat,
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volume, !just_data);
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simdjson::ParsedJson dsimdjson = simdjson::build_parsed_json(p);
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BEST_TIME("simdjson (just dom) ", simdjson_just_dom(dsimdjson).size(), size,
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, repeat, volume, !just_data);
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char *buffer = (char *)malloc(p.size());
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memcpy(buffer, p.data(), p.size());
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rapidjson::Document drapid;
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drapid.ParseInsitu<kParseValidateEncodingFlag>(buffer);
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BEST_TIME("rapid (just dom) ", rapid_just_dom(drapid).size(), size, , repeat,
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volume, !just_data);
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memcpy(buffer, p.data(), p.size());
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auto dsasjon = sajson::parse(sajson::dynamic_allocation(),
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sajson::mutable_string_view(p.size(), buffer));
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BEST_TIME("sasjon (just dom) ", sasjon_just_dom(dsasjon).size(), size, ,
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repeat, volume, !just_data);
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free(buffer);
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}
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