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... you are too slow and QJson API is so ugly. Now using this wonderful json lib: https://github.com/nlohmann/json Results in release mode (QJson tests are not shown but QJson was even slower than string concat). PASS : TestQgsJsonUtils::testExportAttributesJson(Use json) RESULT : TestQgsJsonUtils::testExportAttributesJson():"Use json": 0.0022 msecs per iteration (total: 75, iterations: 32768) PASS : TestQgsJsonUtils::testExportAttributesJson(Use old string concat) RESULT : TestQgsJsonUtils::testExportAttributesJson():"Use old string concat": 0.0032 msecs per iteration (total: 54, iterations: 16384) PASS : TestQgsJsonUtils::testExportFeatureJson(Use json) RESULT : TestQgsJsonUtils::testExportFeatureJson():"Use json": 0.011 msecs per iteration (total: 96, iterations: 8192) PASS : TestQgsJsonUtils::testExportFeatureJson(Use old string concat) RESULT : TestQgsJsonUtils::testExportFeatureJson():"Use old string concat": 0.015 msecs per iteration (total: 64, iterations: 4096) PASS : TestQgsJsonUtils::testExportGeomToJson(Use json) RESULT : TestQgsJsonUtils::testExportGeomToJson():"Use json": 0.76 msecs per iteration (total: 98, iterations: 128) PASS : TestQgsJsonUtils::testExportGeomToJson(Use old string concat) RESULT : TestQgsJsonUtils::testExportGeomToJson():"Use old string concat": 0.85 msecs per iteration (total: 55, iterations: 64) PASS : TestQgsJsonUtils::cleanupTestCase()
65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
#ifndef INCLUDE_NLOHMANN_JSON_FWD_HPP_
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#define INCLUDE_NLOHMANN_JSON_FWD_HPP_
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#include <cstdint> // int64_t, uint64_t
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#include <map> // map
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#include <memory> // allocator
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#include <string> // string
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#include <vector> // vector
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/*!
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@brief namespace for Niels Lohmann
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@see https://github.com/nlohmann
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@since version 1.0.0
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*/
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namespace nlohmann
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{
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/*!
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@brief default JSONSerializer template argument
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This serializer ignores the template arguments and uses ADL
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([argument-dependent lookup](https://en.cppreference.com/w/cpp/language/adl))
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for serialization.
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*/
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template<typename T = void, typename SFINAE = void>
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struct adl_serializer;
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template<template<typename U, typename V, typename... Args> class ObjectType =
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std::map,
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template<typename U, typename... Args> class ArrayType = std::vector,
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class StringType = std::string, class BooleanType = bool,
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class NumberIntegerType = std::int64_t,
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class NumberUnsignedType = std::uint64_t,
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class NumberFloatType = double,
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template<typename U> class AllocatorType = std::allocator,
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template<typename T, typename SFINAE = void> class JSONSerializer =
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adl_serializer>
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class basic_json;
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/*!
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@brief JSON Pointer
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A JSON pointer defines a string syntax for identifying a specific value
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within a JSON document. It can be used with functions `at` and
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`operator[]`. Furthermore, JSON pointers are the base for JSON patches.
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@sa [RFC 6901](https://tools.ietf.org/html/rfc6901)
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@since version 2.0.0
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*/
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template<typename BasicJsonType>
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class json_pointer;
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/*!
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@brief default JSON class
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This type is the default specialization of the @ref basic_json class which
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uses the standard template types.
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@since version 1.0.0
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*/
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using json = basic_json<>;
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} // namespace nlohmann
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#endif // INCLUDE_NLOHMANN_JSON_FWD_HPP_
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