Files
simdjson-simdjson/benchmark/partial_tweets/simdjson_dom.h
strager 5510089d45 Improve build times for debug builds (#1859)
* Rename simdjson_really_inline -> simdjson_inline

I want to change the simdjson_really_inline macro to sometimes not force
inlining. After that upcoming change, the name simdjson_really_inline
will no longer makes sense.

Rename simdjson_really_inline to simdjson_inline. This patch should not
change semantics; simdjson_inline still forces inlining as before.

Some functions still need to be really inlined for ABI reasons.
(GCC's -Wpsabi complains otherwise.) Leave those functions marked as
simdjson_really_inline.

* Improve build times for debug builds

simdjson_inline is used for most simdjson functions. It forces inlining.
In unoptimized/debug builds, this can lead to a lot of machine code
being generated (especially with Address Sanitizer), causing slow
compilation.

Change simdjson_inline to force inlining only for optimized builds.

Sometimes, the programmer might want a slightly-optimized build and want
fast compilation (e.g. GCC's -Og mode). Allow simdjson users to define
the simdjson_inline macro themselves (e.g. on the command line:
-Dsimdjson_inline=inline) in cases where the default behavior is
undesired.

This patch reduced build times by over 75% for ondemand_object_tests.cpp
with GCC 9.4.0 and CMAKE_BUILD_TYPE=Debug on my AMD 5950X:

Before: 6.885 6.683 6.971 6.957 6.949 seconds (5 samples)
After:  1.492 1.551 1.494 1.490 1.531 seconds (5 samples)
2022-07-19 15:14:33 -04:00

44 lines
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C++

#pragma once
#if SIMDJSON_EXCEPTIONS
#include "partial_tweets.h"
namespace partial_tweets {
using namespace simdjson;
struct simdjson_dom {
using StringType=std::string_view;
dom::parser parser{};
simdjson_inline uint64_t nullable_int(dom::element element) {
if (element.is_null()) { return 0; }
return element;
}
bool run(simdjson::padded_string &json, std::vector<tweet<std::string_view>> &result) {
for (dom::element tweet : parser.parse(json)["statuses"]) {
auto user = tweet["user"];
result.emplace_back(partial_tweets::tweet<std::string_view>{
tweet["created_at"],
tweet["id"],
tweet["text"],
nullable_int(tweet["in_reply_to_status_id"]),
{ user["id"], user["screen_name"] },
tweet["retweet_count"],
tweet["favorite_count"]
});
}
return true;
}
};
BENCHMARK_TEMPLATE(partial_tweets, simdjson_dom)->UseManualTime();
} // namespace partial_tweets
#endif // SIMDJSON_EXCEPTIONS