How count-min sketches work – frequencies, but without the actual data

Hacker NewsWednesday, October 22, 2025 at 4:27:26 PM
NeutralTechnology
Count-min sketches are a fascinating data structure that allows for the estimation of frequencies of events without storing the actual data. This technique is particularly useful in scenarios where memory efficiency is crucial, enabling quick approximations of data trends. Understanding how these sketches work can help in various fields, from data analysis to network traffic monitoring, making it a valuable concept for anyone interested in data science.
— Curated by the World Pulse Now AI Editorial System

Was this article worth reading? Share it

Recommended Readings
Vibe Coding in the 90s
NeutralTechnology
The article discusses the phenomenon of vibe coding in the 1990s, a unique approach to programming that emphasized creativity and personal expression over strict technical guidelines. This topic is significant as it highlights how the culture of coding has evolved, reflecting broader changes in technology and society. Understanding vibe coding can provide insights into the roots of modern programming practices and the importance of creativity in tech.
New OSM file format: 30% smaller than PBF, 5x faster to import
PositiveTechnology
A new file format for OpenStreetMap (OSM) has been introduced, boasting a 30% reduction in size compared to the previous PBF format and offering five times faster import speeds. This advancement is significant as it enhances the efficiency of data handling for developers and users alike, making it easier to work with geographic data. The improvements could lead to faster updates and better performance in applications relying on OSM data, ultimately benefiting the broader community.
The Swift SDK for Android
PositiveTechnology
The introduction of the Swift SDK for Android is an exciting development for developers looking to integrate Swift's powerful features into Android applications. This SDK opens up new possibilities for cross-platform development, allowing for a more seamless user experience and potentially increasing the reach of apps built with Swift. As the tech community discusses its implications, this could mark a significant step in bridging the gap between iOS and Android development.
Disable AI in Firefox
NegativeTechnology
The recent decision to disable AI features in Firefox has sparked significant debate among users and tech enthusiasts. Many believe that this move could hinder the browser's competitiveness in an increasingly AI-driven market. As AI tools become more integrated into web experiences, the absence of such features in Firefox may lead to a decline in user engagement and satisfaction.
Men who mean just what they say
NeutralTechnology
The article discusses the importance of clear communication, particularly among men, and how it can impact relationships and understanding. It highlights that when individuals express their thoughts and feelings honestly, it fosters better connections and reduces misunderstandings. This topic is significant as effective communication is a cornerstone of healthy interactions in both personal and professional settings.
The Mainframe Six (2022)
NeutralTechnology
The Mainframe Six is a notable topic in the tech community, particularly in 2022, as discussions around mainframe technology continue to evolve. This article highlights various comments and insights shared by users, reflecting the ongoing interest and relevance of mainframes in modern computing. Understanding these discussions is important as it sheds light on how traditional technologies are adapting to contemporary needs.
Satellite shows what’s really happening at the East Wing of the White House
NegativeTechnology
Recent satellite imagery suggests that the East Wing of the White House is undergoing significant physical changes, raising concerns about its condition. This matters because the White House is not only a symbol of the U.S. government but also a historical landmark. Any signs of deterioration could spark discussions about preservation efforts and the implications for national heritage.
'Attention is all you need' coauthor says he's 'sick' of transformers
NegativeTechnology
The coauthor of the influential paper 'Attention is all you need' has expressed frustration with the current state of transformer models, stating he's 'sick' of them. This sentiment highlights a growing concern in the AI community about the limitations and challenges posed by these models, which have dominated the field for several years. His comments could spark discussions on the need for innovation and new approaches in AI research.
Latest from Technology
I let Edge's Copilot Mode buy me a new space heater - here's how the AI browser did
PositiveTechnology
Microsoft Edge has transformed into an AI-powered browser that can assist with online shopping, and a recent test showcased its capabilities. The author allowed Edge's Copilot Mode to purchase a new space heater, demonstrating how AI can simplify the shopping experience. This development is significant as it highlights the growing integration of AI in everyday tasks, making technology more accessible and efficient for users.
Vibe Coding in the 90s
NeutralTechnology
The article discusses the phenomenon of vibe coding in the 1990s, a unique approach to programming that emphasized creativity and personal expression over strict technical guidelines. This topic is significant as it highlights how the culture of coding has evolved, reflecting broader changes in technology and society. Understanding vibe coding can provide insights into the roots of modern programming practices and the importance of creativity in tech.
Why Starlink Sends So Many Copyright Warnings to Its Users
NegativeTechnology
Starlink's unique approach of assigning a single IP address to multiple homes has led to a surge in copyright infringement warnings sent to its users. This situation is concerning as innocent users may face legal repercussions for actions they did not commit. Understanding this issue is crucial for users to navigate their rights and responsibilities while using the service.
Free Xbox Cloud Gaming With Ads Could Be an Alternative to Pricier Game Pass
PositiveTechnology
Microsoft is testing a free version of its cloud gaming service, which could provide an affordable alternative to the more expensive Game Pass. This move is significant as it opens up gaming access to a broader audience, allowing players to enjoy popular titles without the financial commitment. By incorporating ads, Microsoft aims to balance the cost while still delivering a quality gaming experience, potentially reshaping how gamers engage with cloud services.
Amazon's new Help Me Decide button picks what you were going to buy anyway – just faster
PositiveTechnology
Amazon has introduced a new feature called the 'Help Me Decide' button, which uses AI to suggest products based on your shopping habits. This innovation not only streamlines the purchasing process but also enhances the overall shopping experience by making it quicker and more personalized. It's a significant step forward in e-commerce, as it caters to consumer preferences and saves time, making online shopping even more convenient.
DHS Wants a Fleet of AI-Powered Surveillance Trucks
PositiveTechnology
The US border patrol is taking a significant step towards enhancing security by seeking proposals to transform standard 4x4 trucks into AI-powered surveillance units. This initiative aims to integrate advanced technologies like radar and cameras for real-time monitoring, allowing for more effective border control. This matters because it represents a proactive approach to addressing security challenges, leveraging innovation to improve safety and efficiency in surveillance operations.