Questions tagged as 'desempenho'

Tagged questions
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Select with subquery to pick up previous record

I have a structure of records of user readings by reference. According to data below. SELECT L.LeituraID, L.UsuarioID, L.Referencia, L.Leitura FROM Leituras AS L |-----------|-----------|------------|---------| | LeituraID | UsuarioID | Refe...
asked by 21.11.2018 / 18:28
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Determine memory consumption

Hello, I'm a beginner in Go and I'm having trouble figuring out how much memory the code in Go needed to execute some code. I did the memory () function that even returns something, but I do not know what it would be like to bring the return I w...
asked by 14.10.2018 / 02:00
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Error when querying large amount of data in the Entity framework,

I am putting together a report, and there is the option to query by date range. When I query with the interval of 30 or 60 days, I get the data, where I cluster and return. However, when you increase the query time, the same method returns th...
asked by 28.06.2018 / 21:16
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PostgreSQL - autovacuum on small table

What would be a suitable setting for autovacuum to act on this table? We have a "sequence" table, it does what sequence of postgres should do, but perhaps by using other banks the development opted for this approach, which is to use a...
asked by 18.01.2018 / 12:27
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Array ordering with heapsort simulating multi-child tree

Doubt: To order arrays with heapsort, it is customary to simulate trees with up to two children per parent, not more. My question is whether there are studies, implementations, experiments, reports, accessible data that investigate the perf...
asked by 22.09.2017 / 22:11
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Using unused affect performance?

While developing, I saw that in most of my classes contained a certain amount of using that were not being used and I came to doubt the title. Using unused affects the performance of the application in any way? Do you always need to re...
asked by 21.05.2014 / 16:53
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Model Roofline [closed]

I have a TPC for a college discipline (Advanced Computer Architecture discipline), in which I am asked a question to get the maximum attainable performance in GFLOP / s. After some intensive research, I came to the conclusion that this value is...
asked by 31.12.2016 / 17:55
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Why do you say that using @ atus to suppress errors is a bad practice?

In PHP, we can suppress errors by using arroba before certain expressions. This can be seen at: # I've seen some hangouts on PHP and staff were criticizing the use of @ in PHP, for the thesis that an error should be han...
asked by 03.09.2015 / 17:17
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Problems closing splash screen of RAD (v7.5)

I'm having an unusual problem (who does not?), my launcher / splash screen opens, but it keeps this state even after I choose the desktop and after the RAD loads the project. It only closes when I stop all software. The last change my RAD underw...
asked by 26.12.2014 / 13:02
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Best approach is to filter data in the database or application?

Suppose we have a 'Vendas' table with the following 'estado', 'cidade', 'vendedor', 'valor' columns. 'estado' and 'cidade' would be where the sale was made and 'vendedor' would be what made that sale. 'v...
asked by 07.06.2017 / 19:45