Sony Pixel Power calrec Sony

Just What You're Looking For: Recommender Team Suggests Winning Strategies

20/07/2021

The final push for the hat trick came down to the wire.

Five minutes before the deadline, the team submitted work in its third and hardest data science competition of the year in recommendation systems. Called RecSys, it's a relatively new branch of computer science that's spawned one of the most widely used applications in machine learning, one that helps millions find what they want to watch, buy and play.

The team's combination of six AI models packed into the contest's limit of 20 gigabytes all of the smarts it culled from studying 750 million data points. An unusual rule in the competition said the models had to run in less than 24 hours on a single core in a cloud CPU.

They hit the submission button and waited.

Twenty-three hours and 40 minutes later an email arrived: They hit No. 1 on the leaderboard.

Right Under the Buzzer On June 28 it was official, a seven-member NVIDIA team won for the second time the ACM RecSys Challenge.

The email came in right under the buzzer - 20 minutes later and we would have timed out, said Chris Deotte, one of several team members who's also a grandmaster in Kaggle competitions, the online Olympics of data science.

We were really on the edge, said Benedikt Schifferer, a teammate who helps design NVIDIA Merlin, a framework to help users quickly build their own recommendation systems.

GPUs could have busted through the inference job in a fraction of the time. Adapting the work to one CPU core was like going back to the distant past, said Gilberto Giba Titericz, a Brazil-based Kaggle grandmaster on the team.

In fact, once the competition was over, the team demonstrated the inference job that took nearly 24 hours on a CPU core could run on a single NVIDIA A100 Tensor Core GPU in just five and a half minutes.

Sorting 40M Items a Day For that competition, Twitter gave participants millions of data points a day for 28 days and asked them to predict which tweets users would like or retweet. It was an industrial-strength challenge from the leading technical conference on RecSys, an event that draws a who's who of top engineers from Facebook, Google, Spotify and other players.

Part of the RecSys Challenge team (clockwise from upper left): Bo Liu, Benedikt Schifferer, Gilberto Titericz and Chris Deotte. The discipline is as hard as it is helpful. Recommendation systems fuel our digital economy, serving up suggestions faster and smarter than a traditional search.

Industry challenges help advance the field for everyone, whether they're seeking the perfect gift for a spouse or trying to find an old friend online.

Three Wins in Five Months Earlier this year, the full NVIDIA team led a field of 40 in the Booking.com Challenge. They used millions of anonymized data points to correctly predict the final city a vacationer in Europe would choose to visit.

In June, another top recsys contest, the SIGIR eCommerce Data Challenge, set an even higher hurdle.

SIGIR challenge winners include (clockwise from upper left) Ronay Ak, Sara Rabhi, Md Yasin Kabir and team leader Gabriel Moreira. The annual meeting of the Special Interest Group on Information Retrieval, SIGIR, draws experts from companies that span Alibaba to Walmart Labs. Its 2021 challenge provided 37 million data points from online shopping sessions and asked participants to predict which products users would buy.

Overlap with the ACM contest forced the NVIDIA team to split into two groups that coordinated their efforts between the contests. Ratcheting up the pressure, some team members were heads down writing a paper for the ACM RecSys conference.

The Art of the Fast Break Two factors propelled a five-person NVIDIA team with members spread across Brazil, Canada, France and the U.S. to the best overall performance, taking first or second place in every leaderboard. They made a big bet on Transformer models developed for natural-language processing and increasingly adopted for recsys, and they understood the art of the handoff.

As one member is going to bed another picks up the work in a different time zone, said Even Oldridge, who leads the Merlin group.

When it all clicks, it's very effective, and I'm amazed at what we've accomplished in the last year building our internal knowledge and our standing in the recsys community to the point where we could win three major competitions in five months, he said.

Respecting User Privacy The contest required models to make predictions with no background on users beyond their current browsing session.

That's an important task because sometimes users want to browse anonymously, and some privacy laws limit access to historical information, said Gabriel Moreira, a senior Merlin researcher in S o Paulo who led NVIDIA's SIGIR team.

The competition marked the first time the team used only Transformer models in their solution to a challenge. Moreira's team aims to make the massive neural networks more easily available to every Merlin customer.

From a Hat Trick to a Haul On June 30, we notched a fourth consecutive win in RecSys, what hockey players call a haul. MLPerf, an industry benchmarking group, announced that NVIDIA and its partners set records in all its latest training benchmarks, including one in recommendation systems.

The team behind that effort described its work training a recommendation system in less than a minute on 14 NVIDIA DGX systems, a 3.3x speedup compared to their submission a year ago.

Sharing Lessons Learned The competitions fuel ideas for new techniques that find their way into recsys frameworks like Merlin and related tools, papers and online classes held by the NVIDIA Deep Learning Institute. The ultimate goal: Help everyone succeed.

In interviews NVIDIA's recsys experts freely shared their know-how - part art, part science.

A Pro Tip on RecSys One best practice is
LINK: https://blogs.nvidia.com/blog/2021/07/20/recommendation-systems-winner...
See more stories from nvidia

Most recent headlines

05/01/2027

Worlds first 802.15.4ab-UWB chip verified by Calterah and Rohde & Schwarz to be demoed at CES 2026

Worlds first 802.15.4ab-UWB chip verified by Calterah and Rohde & Schwarz to be ...

07/10/2026

Dalet Flex LTS Delivers Smarter Media Operations from Ingest to Distribution

Dalet, a leading technology and service provider for media-rich organizations, today announced the latest Long-Term Supported (LTS) release of Dalet Flex. Build...

06/09/2026

Dolby and MagentaTV Bring Fans Closer to the FIFA World Cup 2026 in Germany with Dolby Vision and Dolby Atmos

June 9 2026, 23:00 (PDT) Dolby and MagentaTV Bring Fans Closer to the FIFA Worl...

02/09/2026

SVG Venues & Teams Summit 2026: All Sessions Now Available To Watch on SVG PLAY

Professional and collegiate clubs, leading vendors discuss current trends in stadium production On. Aug. 12, the 2026 SVG Venues & Teams Summit explored the ev...

02/09/2026

SoFi Stadium Completes Broadcast Infrastructure Upgrade

SoFi Stadium, YouTube Theater, and Hollywood Park have completed an infrastructure upgrade expanding game presentation and broadcast production capabilities acr...

02/09/2026

IBC 2026: Comcast Technology Solutions Unveils AI-Powered Workflow Applications

Comcast Technology Solutions (CTS) has announced a suite of AI-powered workflow applications for broadcasters, content owners, and operators, built on its Video...

02/09/2026

NABA and APWPT Announce Partnership on Wireless Spectrum Advocacy

The North American Broadcasters Association (NABA) and the Association of Professional Wireless Production Technologies (APWPT) have announced a partnership to ...

02/09/2026

Prime Video Lands Exclusive In-Market Streaming Rights for Six NHL Teams Beginning This Season

Carolina Hurricanes, Anaheim Ducks, Columbus Blue Jackets, Dallas Stars, Minneso...

02/09/2026

Mercedes-Benz Stadium Goes Mini: Nine-Year-Old Venue Continues to Innovate With Control Room Mini Halo Board

New LED provides enhanced quality control, quicker show prep, detailed productio...

02/09/2026

Keeley Electronics launch the Tube Drive

Combines the Phat Drive with high-voltage valve circuit The latest pedal from Keeley Electronics combines their popular Phat Mode drive pedal with an all-ne...

02/09/2026

Lewitt introduce Space Replicator Free

Free version of virtual mixing room plug-in introduced Lewitt's Space Replicator plug-in provides users with a virtual monitoring environment that aims ...

02/09/2026

Stereophonic Bundle from AIR Music Tech

Two new mixing & mastering plug-ins revealed AIR Music Tech have just introduced the Stereophonic Bundle, a pair of processing plug-ins designed to provide ...

02/09/2026

Rohde & Schwarz has achieved initial verification of 3GPP Rel. 17 power-saving feature SSSG for 5G NR

Rohde & Schwarz has achieved initial verification of 3GPP Rel. 17 power-saving f...

02/09/2026

AgileTV and Fiend MTS Complete CDN Watermarking Integration to Fast-Track Anti-Piracy Protection for Operators

Bilbao - 3rd September 2026 -AgileTV, a leading provider of end-to-end TV and vi...

02/09/2026

Agentic AI in the content supply chain

Why agentic media supply chains need experience design built around visibility, reversibility and human authority When AI can generate a functional interface ...

02/09/2026

Gracenote study: 85% of sports fans want TV home screens to show when and where to watch favorite teams

Six-country survey finds 26% of sports fans frequently unable to determine where...

02/09/2026

Manfrotto Showcases New Video Support Solutions at IBC 2026

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

Mediagenix Rebrands Spideo as Mediagenix Curation

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

Creative Technology Group Founder Graham Andrews Sets Year-End Exit

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

San Antonio Spurs, DAZN Ink Exclusive Streaming Deal

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

DPA Launches 6388 CORE Headset Microphone With Shifted Ac...

KOKKEDAL, DENMARK, SEPTEMBER 1, 2026 DPA Microphones announces its new 6388 CORE Headset Microphone, a high-performance directional headset designed for dema...

02/09/2026

Pliant Technologies Spotlights CrewCom CXD 32CF Dante AES...

Pliant Technologies will highlight its CrewCom CXD 32CF 32x32 Dante /AES67 Digital Audio Network Interface, a powerful connectivity solution designed to expand ...

02/09/2026

iWedia Enhances Teatro Pulse with Edge AI Self-Healing an...

iWedia, a leading provider of software solutions for connected TV devices, today announced two enhancements to Teatro Pulse, its end-to-end TV service operation...

02/09/2026

Signiant Accelerates More Than File Transfers at IBC2026

Signiant, trusted by the media industry for accelerated content movement for more than 20 years, will showcase the latest evolution of the Signiant Platform at ...

02/09/2026

Calrec Argo M Powers Cloudbass Next Generation OB Fleet

With a contractual agreement to supply a leading UK sports broadcaster with outside broadcast services for 104 football matches per season over the next four ye...

02/09/2026

IBC2026 puts sport at the winning end of media innovation

IBC2026 will put sport firmly at the centre of the global media and entertainment technology conversation with the strongest sports showing in the event's h...

02/09/2026

PTZOptics Demonstrates the Power of Intelligent Multicame...

PTZOptics will bring a hands-on showcase of intelligent video production to IBC2026 (11-14 September, RAI Amsterdam), with demonstrations spanning new camera te...

02/09/2026

OOONA Launches OOONA Go

OOONA, a global provider of professional management and production tools for the media localization industry, today announced the launch of OOONA Go, a ready-to...

02/09/2026

EON Media launches AI media activation and monetization s...

EON Media will make its European debut at IBC2026 (September 11-14, RAI Amsterdam) in the show's Future Tech Zone (Hall 14.FT5). The company is launching it...

02/09/2026

Frequency Defines the Intelligent Channel at IBC2026

Frequency, the engine behind many of the worlds leading streaming television channels, will demonstrate at IBC2026 how integrating intelligence throughout chann...

02/09/2026

FOR-A Introduces Go Vertical AiDi and AiDi Sports Hub Und...

On-device AI platform gives broadcasters and content creators purpose-built tools for real-time vertical video production and AI-enhanced sports coverage...

02/09/2026

Shotoku To Introduce Aura E2 PTZ Elevator At IBC2026

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

AJA to Launch New openGear SDI/Fiber Conversion Cards at IBC2026

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

GoPro to Merge with Starman Optical

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

AIMS, EBU Completes Latest IPMX Certification Testing

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

EVS To Showcase New Neuron 4X Processor At IBC 2026

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

Sony Launches 100+ FAST Channels on Playstation 5 in the U.S.

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

Canon Unveils PTZ Camera Firmware Updates

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

EverPass Media Expands NFL Offering with Netflix Deal

Share Copy link Facebook X Linkedin Bluesky Email...

02/09/2026

Imagine Communications Unveils Latest Control Portfolio A...

Next-Generation Freeform Control Surfaces Lay the Foundation for AI-Enabled Media Operations At IBC2026 (Sept. 11 14, RAI Amsterdam, Stand #1.B73), Imagine Com...

02/09/2026

Friedrichstadt-Palast Relies on Riedel for IP-Centered Pr...

Friedrichstadt-Palast in Berlin, the world's largest theater stage, has modernized its backstage production infrastructure with a comprehensive Riedel solut...

02/09/2026

WiM to Host Reel Forward Production Conference at CSU Los...

Women in Media announces that it will host the two-day Reel/Forward in-person conference devoted to navigating today's production scene. Guests can enjoy pa...

02/09/2026

Teradek and New Media AV Expand Partnership with Full Liv...

The expanded partnership brings Teradek's Live Production solutions to New Media AV's European dealer and integrator network, opening new opportunities ...

02/09/2026

QuickLink Expands StudioEdge With WhatsApp Cisco Webex an...

QuickLink, a leading provider of award-winning video production and remote guest contribution solutions, announces a major expansion to its award winning Studio...

02/09/2026

Vipe by BCNEXXT Gives Foxtel a New Playout Model for its...

BCNEXXT, the developers of the advanced playout platform Vipe, today announced that premium entertainment brand Foxtel has selected Vipe to underpin playout for...

02/09/2026

HOT Telecommunications supercharges localisation efficien...

SubtitleNEXT helps HOT Telecom's subtitling team keep a cool head with reliable QC capabilities Profuz Digital, global developer of digital media and local...

02/09/2026

Case Study - Mission Digital Strengthens Battery Safety w...

Case Study: Mission Digital Strengthens Battery Safety with Safe-ion As productions become increasingly dependent on battery-powered equipment, the safe storag...

02/09/2026

New design strategy expands nanoparticle vaccine approach to influenza viruses

LA JOLLA, CA-Influenza viruses constantly shapeshift to evade recognition by the immune system. This shapeshifting occurs in critical proteins like hemagglutini...

02/09/2026

New AI algorithm could improve detection and prediction of heart diseases

LA JOLLA, CA-Clinicians often use a medical test called a 12-lead electrocardiogram (ECG) to diagnose heart problems, which uses electrodes placed on the chest ...

02/09/2026

Where milliseconds matter: Scripps Research scientists build new ML model to predict protein movements essential for biological function

LA JOLLA, CA-Proteins may look like rigid molecular structures, but inside our c...