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LibCore: Use JsonObject::get_ptr() in CProcessStatisticsReader

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This removes a bunch of JsonValue copying from the hot path in thread
statistics fetching.

Also pre-size the thread statistics vector since we know the final size
up front. :^)
This commit is contained in:
Andreas Kling
2019-12-30 14:50:40 +01:00
parent 7011dba98e
commit 1b2c6e8f41
1 changed files with 2 additions and 1 deletions
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3
Libraries/LibCore/CProcessStatisticsReader.cpp
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@@ -44,7 +44,8 @@ HashMap<pid_t, CProcessStatistics> CProcessStatisticsReader::get_all()
process.amount_purgeable_nonvolatile = process_object.get("amount_purgeable_nonvolatile").to_u32();
process.icon_id = process_object.get("icon_id").to_int();
auto thread_array = process_object.get("threads").as_array();
auto& thread_array = process_object.get_ptr("threads")->as_array();
process.threads.ensure_capacity(thread_array.size());
thread_array.for_each([&](auto& value) {
auto& thread_object = value.as_object();
CThreadStatistics thread;