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SKP's Java/Java EE Gotchas: Clash of the Titans, C++ vs. Java!

DZone

As a Software Engineer, the mind is trained to seek optimizations in every aspect of development and ooze out every bit of available CPU Resource to deliver a performing application. This begins not only in designing the algorithm or coming out with efficient and robust architecture but right onto the choice of programming language.

Java 207
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C++ safety, in context

Sutter's Mill

To talk about C++’s current safety problems and solutions well, I need to include the context of the broad landscape of security and safety threats facing all software. tl;dr: I don’t want C++ to limit what I can express efficiently. tl;dr: I don’t want C++ to limit what I can express efficiently. issues with C++.

C++ 139
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Faster remainders when the divisor is a constant: beating compilers and libdivide

Daniel Lemire

I believe that all optimizing C/C++ compilers know how to pull this trick and it is generally beneficial irrespective of the processor’s architecture. In concrete terms, here is the C code to compute the remainder of the division by some fixed divisor d : uint32_t d =. ; // your divisor > 0. if ( ( i % 3 ) = = 0 ).

C++ 279
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Matching Supply With Demand — Solutions, Part 3

SQL Performance

The tricky part about this solution is its performance degrades as the largest interval length increases. The CTE W then performs a full outer join between D and S, matching D.Running with S.Running, and returns the first non-NULL among D.Running and S.Running as W.Running. That’s a pretty efficient plan! seconds to complete.

C++ 138
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Additional T-SQL Improvements in SQL Server 2022

SQL Performance

One of the complexities that is of a specific importance to this section is comparisons that potentially involve NULL comparands, such as ones that you use in filter and join predicates. Most operators that you use in such comparisons, including the equals (=) and different than (<>) operators, use three-valued logic.

Servers 142
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Islands T-SQL Challenge

SQL Performance

Finally, I’ll compare the performance of the different solutions. To test the performance of your solution, you’ll need to populate the table with larger volumes of sample data. L0 AS ( SELECT 1 AS c. Remember, extra points if you manage to come up with an efficient solution without explicit sorting in the plan.

C++ 136
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Batch Mode Normalization and Performance

SQL Performance

This article explores the batch data normalized representation, explains why not all eight-byte data types can fit within 64 bits, and shows an example of how all this affects batch-mode performance. c = COUNT_BIG ( * ) FROM #T AS T WHERE 1 = ( SELECT 1 ) -- Avoid trivial plan. c1 = @Start + N. FROM #Numbers AS N ; GO.