Understanding Grouping Sets in SQL
Introduction
The GROUP BY clause in SQL is widely recognized for organizing data according to specific criteria, often combined with aggregate functions.
Consider a table named dealer with the following entries:
id (Int)
city (String)
car_model (String)
quantity (Int)
100
Fremont
Honda Civic
10
100
Fremont
Honda Accord
15
100
Fremont ...
Posted on Fri, 08 May 2026 20:20:41 +0000 by MBK
Memory Reuse with sync.Pool and GC-Induced Evictions
The sync package provides a type-safe object pool that aims to reduce pressure on the garbage collector by reusing allocated instances. Measuring the actual benefit requires careful benchmarking, because the pool's internal behavior can unexpectedly degrade performance when GC cycles are involved.
A minimal pool definition looks like this:
type ...
Posted on Fri, 08 May 2026 08:05:31 +0000 by stomlin
Optimizing UGUI Performance
Core Concepts
All UI elements are rendered using mesh-based geometry.
An Image component consists of two triangles forming four vertices.
A draw call represents a GPU command submission for rendering an object or batch of objects. Each draw call involves sending rendering instructions to the graphics processor.
Fill rate refers to the number of ...
Posted on Fri, 08 May 2026 02:04:05 +0000 by Trek15
Optimizing Loop Performance in Python: Why Native Loops May Be Slower Than You Think
Understanding Loop Performence in Python
Python's execution speed has always been a topic of discussion among developers. The language is known for readability and ease of use, but not necessarily for raw performance. This becomes particularly evident when dealing with repetitive operations like loops.
When a single operation takes one unit of ...
Posted on Thu, 07 May 2026 22:56:25 +0000 by atawmic
Accelerating Elasticsearch Indexing Through Gateway Optimization
Test Environment
- Primary cluster: http://10.0.1.2:9200, username: elastic, password: ***, 9 nodes, hardware specs: 12C64GB (31GB JVM)
- Secondary cluster: http://10.0.1.15:9200, username: elastic, password: ***, 9 nodes, hardware specs: 12C64GB (31GB JVM)
- Gateway server 1 (Public IP:120.92.43.31, Internal IP:192.168.0.24) hardware specs: 4 ...
Posted on Thu, 07 May 2026 12:30:31 +0000 by hdpt00