experimental parallel json parser, (using simdjson, thread)
scanning - simd,
parsing - multi-thread(used in clauparser),
save - multi-thread
(C++14~, 64bit)
https://github.com/vztpv/scj3_cmake_test
//claujson::init(0); // //
claujson::parser p;
claujson::writer w;
claujson::Document d;
bool ok;
auto x = p.parse(argv[1], d, 0); // filename, Value, thread_num...
claujson::_Value& j = d.Get();
if (!x.first) {
std::cout << "fail\n";
//claujson::clean(j);
return 1;
}
//claujson::save("test12.txt", j);
w.write_parallel("test34.json", j, 0);
int counter = 0;
ok = x.first;
double sum = 0;
static const auto& _geometry = claujson::_Value("geometry"sv);
static const auto& _coordinates = claujson::_Value("coordinates"sv);
if (true && ok) {
for (int i = 0; i < 1; ++i) {
if (j.is_structured()) {
auto& features = j[1];
claujson::Array* features_arr = features.as_array(); // as_array_ptr() ?
if (!features_arr) {
continue;
}
for (auto& feature : *features_arr) { // feature["geometry"sv] <- no utf-8 str chk?, at("geometry"sv) : check valid utf-8 str?
auto& coordinate = feature[_geometry][_coordinates][0];
claujson::Array* coordinate_arr = coordinate.as_array();
if (!coordinate_arr) {
continue;
}
for (auto& coordinate_ : *coordinate_arr) {
claujson::Array* coordinate__arr = coordinate_.as_array();
if (!coordinate__arr) {
continue;
}
for (auto& x : *coordinate__arr) {
if (x.is_float()) {
sum += x.float_val();
counter++;
}
}
}
}
}
}
}
std::cout << sum << " ";
std::cout << counter << " ";
//claujson::clean(j);
Using simdjson/simdjson (https://github.com/simdjson/simdjson) MIT License
Copyright 2018-2025 The simdjson authors
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Copyright (c) 2012 - present, Victor Zverovich and {fmt} contributors
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
--- Optional exception to the license ---
As an exception, if, as a result of your compiling your source code, portions
of this Software are embedded into a machine-executable object form of such
source code, you may redistribute such embedded portions in such object form
without including the above copyright and permission notices.
Copyright (c) 2012 Jakob Progsch, Václav Zeman
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial appiolicatns, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.