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우병수

Tech writer covering AI tools, SaaS, and developer productivity. Sharing real-world tooling experiences from building production apps. Read more at techdigestor.com

Location Seoul, South Korea Joined Joined on  Personal website https://techdigestor.com github website
Thinking About Performance Like Mathieu Ropert: What C++ Devs Get That the Rest of Us Should Steal
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Thinking About Performance Like Mathieu Ropert: What C++ Devs Get That the Rest of Us Should Steal

#discuss #productivity #tools #webdev
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25 min read

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DOS Development in the Early Days: What It Was Actually Like to Ship Software on 640KB
ericwoooo_kr profile

DOS Development in the Early Days: What It Was Actually Like to Ship Software on 640KB

#discuss #productivity #tools #webdev
Comments
28 min read
Unsigned Sizes Bit Me in Production — Here's How I Finally Got My Head Around Them
ericwoooo_kr profile

Unsigned Sizes Bit Me in Production — Here's How I Finally Got My Head Around Them

#rust #productivity #tools #webdev
Comments
24 min read
Zero Bugs Is a Process, Not a Goal: Here's How I Actually Get Close
ericwoooo_kr profile

Zero Bugs Is a Process, Not a Goal: Here's How I Actually Get Close

#discuss #productivity #tools #webdev
Comments
23 min read
VS Code Shortcuts I Actually Use Every Day (And a Few I Slept On for Too Long)
ericwoooo_kr profile

VS Code Shortcuts I Actually Use Every Day (And a Few I Slept On for Too Long)

#vscode #productivity #tools #webdev
Comments
24 min read
Building a Browser-Based 3D Modeling Tool with Three.js: What the Docs Don't Tell You
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Building a Browser-Based 3D Modeling Tool with Three.js: What the Docs Don't Tell You

#discuss #productivity #tools #webdev
Comments
30 min read
How to Validate a SaaS Idea Without an Audience or Self-Promotion
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How to Validate a SaaS Idea Without an Audience or Self-Promotion

#discuss #productivity #tools #webdev
Comments
23 min read
I Ran Kubernetes and Traditional Hosting Side-by-Side — Here's When Kubernetes Actually Won
ericwoooo_kr profile

I Ran Kubernetes and Traditional Hosting Side-by-Side — Here's When Kubernetes Actually Won

#devops #docker #cloud #tutorial
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23 min read
Mookbars: I Replaced My Bookmark Chaos with Environment Variables and Never Looked Back
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Mookbars: I Replaced My Bookmark Chaos with Environment Variables and Never Looked Back

#discuss #productivity #tools #webdev
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18 min read
Debugging Async Job Failures Across Multiple Steps Without Losing Your Mind
ericwoooo_kr profile

Debugging Async Job Failures Across Multiple Steps Without Losing Your Mind

#ai #programming #machinelearning #webdev
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31 min read
Physics-Informed Neural Networks in the Wild: How I Actually Implemented PINN Research in a Production Pipeline
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Physics-Informed Neural Networks in the Wild: How I Actually Implemented PINN Research in a Production Pipeline

#discuss #productivity #tools #webdev
Comments
29 min read
5 Self-Hosted Web Calendars I Actually Ran in Production (and One I Ripped Out)
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5 Self-Hosted Web Calendars I Actually Ran in Production (and One I Ripped Out)

#discuss #productivity #tools #webdev
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23 min read
cPanel/WHM Is Down — Here's What I Actually Use to Manage Shared and VPS Hosting Without Paying for a Panel
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cPanel/WHM Is Down — Here's What I Actually Use to Manage Shared and VPS Hosting Without Paying for a Panel

#discuss #productivity #tools #webdev
Comments
25 min read
My Data Query Times Dropped 80% After I Stopped Fighting Qbeast and Let OTree's Spatial Index Do Its Job
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My Data Query Times Dropped 80% After I Stopped Fighting Qbeast and Let OTree's Spatial Index Do Its Job

#discuss #productivity #tools #webdev
1
Comments
24 min read
Building a Free AI Layer Over NCERT/CBSE: How I Wired Together Ollama, LangChain, and a React Frontend for Indian Classrooms
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Building a Free AI Layer Over NCERT/CBSE: How I Wired Together Ollama, LangChain, and a React Frontend for Indian Classrooms

#ai #react #machinelearning #javascript
1
Comments
29 min read
I Built a Self-Contained Bookmarks Page from Environment Variables — No Database Needed
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I Built a Self-Contained Bookmarks Page from Environment Variables — No Database Needed

#ai #machinelearning #productivity #docker
2
Comments
19 min read
CloudFront + Vercel + Lambda@Edge: A Debugging Journal from Someone Who's Been Paged at 2am
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CloudFront + Vercel + Lambda@Edge: A Debugging Journal from Someone Who's Been Paged at 2am

#programming #webdev #tutorial #aws
1
Comments
30 min read
VS Code Shortcuts I Actually Use Every Day (and a Few That Took Me Too Long to Discover)
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VS Code Shortcuts I Actually Use Every Day (and a Few That Took Me Too Long to Discover)

#vscode #productivity #tools #webdev
Comments
26 min read
cPanel/WHM Auth Bypass Vulnerabilities: What Web Devs Actually Need to Lock Down
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cPanel/WHM Auth Bypass Vulnerabilities: What Web Devs Actually Need to Lock Down

#discuss #productivity #tools #webdev
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22 min read
I Cleaned Up My LinkedIn Feed with a Free Open Source AI Spam Filter — Here's How to Actually Set It Up
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I Cleaned Up My LinkedIn Feed with a Free Open Source AI Spam Filter — Here's How to Actually Set It Up

#ai #machinelearning #productivity #opensource
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18 min read
Three Months With Browser-Based 3D Modeling Tools: What Actually Works in 2024
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Three Months With Browser-Based 3D Modeling Tools: What Actually Works in 2024

#discuss #productivity #tools #webdev
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18 min read
LogoQR: I Spent a Week Making QR Codes That Don't Look Like Prison Barcodes
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LogoQR: I Spent a Week Making QR Codes That Don't Look Like Prison Barcodes

#discuss #productivity #tools #webdev
Comments
19 min read
AI Coding Tools Are Making Me Faster — But Are They Making Me Worse?
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AI Coding Tools Are Making Me Faster — But Are They Making Me Worse?

#ai #machinelearning #productivity #tools
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24 min read
Qbeast's OTree Index Actually Made My Spark Queries Stop Scanning the Whole Lake
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Qbeast's OTree Index Actually Made My Spark Queries Stop Scanning the Whole Lake

#discuss #productivity #tools #webdev
Comments
18 min read
Stackless Coroutines for Gamedev in ~200 Lines of C++: Write Your Own Before Reaching for a Library
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Stackless Coroutines for Gamedev in ~200 Lines of C++: Write Your Own Before Reaching for a Library

#discuss #productivity #tools #webdev
Comments
31 min read
The Cheapest Azure VM That Actually Works for DevOps Workloads (Without Making You Want to Quit)
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The Cheapest Azure VM That Actually Works for DevOps Workloads (Without Making You Want to Quit)

#devops #productivity #tools #webdev
Comments
23 min read
Per-Query Safeguards for Agent-Driven Database Access: What Actually Works in Production
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Per-Query Safeguards for Agent-Driven Database Access: What Actually Works in Production

#discuss #productivity #tools #webdev
Comments
32 min read
Project Yellow Olive: Building a Pokémon Yellow-Inspired Kubernetes TUI Game in Go
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Project Yellow Olive: Building a Pokémon Yellow-Inspired Kubernetes TUI Game in Go

#devops #cloud #docker #tutorial
Comments
33 min read
Docker Image Builds Keep Breaking Your CI? Here's How I Fixed That
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Docker Image Builds Keep Breaking Your CI? Here's How I Fixed That

#docker #devops #cloud #tutorial
Comments
29 min read
I Filtered LinkedIn AI Slop Using an Open Source Extension — Here's the Exact Setup
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I Filtered LinkedIn AI Slop Using an Open Source Extension — Here's the Exact Setup

#ai #machinelearning #productivity #tools
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20 min read
LogoQR: I Added Custom Logos to QR Codes and Here's What Actually Works
ericwoooo_kr profile

LogoQR: I Added Custom Logos to QR Codes and Here's What Actually Works

#discuss #productivity #tools #webdev
Comments
23 min read
I Built a Browser-Based 3D Modeling Tool in 3 Months — Here's Every Decision I'd Make Differently
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I Built a Browser-Based 3D Modeling Tool in 3 Months — Here's Every Decision I'd Make Differently

#discuss #productivity #tools #webdev
Comments
33 min read
AI Coding Tools Are Making Us Dependent — Aviation Figured This Out 40 Years Ago
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AI Coding Tools Are Making Us Dependent — Aviation Figured This Out 40 Years Ago

#ai #machinelearning #productivity #tools
1
Comments
24 min read
Adaptive Compression for Inverted Indexes: How I Stopped Wasting 60% of My Disk Budget
ericwoooo_kr profile

Adaptive Compression for Inverted Indexes: How I Stopped Wasting 60% of My Disk Budget

#discuss #productivity #tools #webdev
Comments
31 min read
The Three Durable Function Forms: Orchestrators, Activities, and Entities (With Real Code)
ericwoooo_kr profile

The Three Durable Function Forms: Orchestrators, Activities, and Entities (With Real Code)

#discuss #productivity #tools #webdev
Comments
20 min read
Stackless Coroutines in ~200 Lines of C++: How I Manage Game State Without the Headaches
ericwoooo_kr profile

Stackless Coroutines in ~200 Lines of C++: How I Manage Game State Without the Headaches

#discuss #productivity #tools #webdev
Comments
28 min read
Canonical's Ubuntu Infrastructure Got DDoS'd — Here's What We Can Actually Learn From It
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Canonical's Ubuntu Infrastructure Got DDoS'd — Here's What We Can Actually Learn From It

#discuss #productivity #tools #webdev
Comments
30 min read
Vibe Coding Actually Changed How I Write Features — Here's What That Looks Like Day-to-Day
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Vibe Coding Actually Changed How I Write Features — Here's What That Looks Like Day-to-Day

#discuss #productivity #tools #webdev
Comments
22 min read
Stop Drowning in Console Noise: Using Negative Regex Filters in Chrome DevTools
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Stop Drowning in Console Noise: Using Negative Regex Filters in Chrome DevTools

#discuss #productivity #tools #webdev
Comments
18 min read
Are AI Coding Subscriptions Worth It for Your Dev Team? Here's What We Actually Spent (and Cut)
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Are AI Coding Subscriptions Worth It for Your Dev Team? Here's What We Actually Spent (and Cut)

#ai #machinelearning #productivity #tools
1
Comments
24 min read
AI Coding Assistants Made Me Faster But Dumber — Here's the Honest Breakdown
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AI Coding Assistants Made Me Faster But Dumber — Here's the Honest Breakdown

#ai #machinelearning #productivity #vscode
Comments
25 min read
LSM Trees: Why Your Database Is Secretly Using One and What It's Actually Doing
ericwoooo_kr profile

LSM Trees: Why Your Database Is Secretly Using One and What It's Actually Doing

#discuss #productivity #tools #webdev
Comments
49 min read
How Search Engines Shrink Inverted Indexes Without Killing Query Speed: Adaptive Compression in Practice
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How Search Engines Shrink Inverted Indexes Without Killing Query Speed: Adaptive Compression in Practice

#discuss #productivity #tools #webdev
Comments
32 min read
The Tiny UDP Cannon: How QUIC Optimization Bypasses Android VPN Tunnels (And What To Do About It)
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The Tiny UDP Cannon: How QUIC Optimization Bypasses Android VPN Tunnels (And What To Do About It)

#discuss #productivity #tools #webdev
Comments
22 min read
The Three Durable Function Forms in F#: What Each One Actually Does and When to Reach for It
ericwoooo_kr profile

The Three Durable Function Forms in F#: What Each One Actually Does and When to Reach for It

#discuss #productivity #tools #webdev
Comments
22 min read
Stackless Coroutines in C++ for Games: I Rewrote Our AI System Using Them and Here's What I Learned
ericwoooo_kr profile

Stackless Coroutines in C++ for Games: I Rewrote Our AI System Using Them and Here's What I Learned

#ai #machinelearning #productivity #tools
Comments
36 min read
Linux Kernel Vulnerabilities Are Scarier Than You Think — Here's What Actually Happens to Your Distro
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Linux Kernel Vulnerabilities Are Scarier Than You Think — Here's What Actually Happens to Your Distro

#discuss #productivity #tools #webdev
Comments
32 min read
Linux Kernel CVEs Don't Care About Your Distro's Release Schedule — Here's What Actually Happens
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Linux Kernel CVEs Don't Care About Your Distro's Release Schedule — Here's What Actually Happens

#discuss #productivity #tools #webdev
Comments
29 min read
Web Test Recorders That Actually Replay Correctly (I've Broken Enough CI Pipelines to Know)
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Web Test Recorders That Actually Replay Correctly (I've Broken Enough CI Pipelines to Know)

#discuss #productivity #tools #webdev
Comments
29 min read
How I Stopped Being the Bottleneck in My Own SaaS: A Founder's Delegation Stack
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How I Stopped Being the Bottleneck in My Own SaaS: A Founder's Delegation Stack

#discuss #productivity #tools #webdev
1
Comments
24 min read
Tailscale vs Headscale: I Ran Both for My Private Journaling Setup — Here's the Honest Breakdown
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Tailscale vs Headscale: I Ran Both for My Private Journaling Setup — Here's the Honest Breakdown

#ai #machinelearning #productivity #tools
1
Comments
22 min read
Ubuntu vs Fedora for Home Server: I Ran Both for 6 Months and Here's What Actually Matters
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Ubuntu vs Fedora for Home Server: I Ran Both for 6 Months and Here's What Actually Matters

#discuss #productivity #tools #webdev
Comments
31 min read
CircleCI Dynamic Config + Tag Pipelines: Why You're Getting 'No Workflow' and How to Fix It
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CircleCI Dynamic Config + Tag Pipelines: Why You're Getting 'No Workflow' and How to Fix It

#discuss #productivity #tools #career
Comments
28 min read
SASL-OAuthbearer with AWS Lambda: How I Stopped Fighting Kafka Auth at 2am
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SASL-OAuthbearer with AWS Lambda: How I Stopped Fighting Kafka Auth at 2am

#aws #cloud #devops #tutorial
Comments
25 min read
AWS SES vs Postmark vs Resend: Which One Actually Works for a Small Business?
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AWS SES vs Postmark vs Resend: Which One Actually Works for a Small Business?

#aws #cloud #devops #tutorial
Comments
24 min read
LSM Trees: Why Your Database Writes Are Fast and Your Reads Are Lying to You
ericwoooo_kr profile

LSM Trees: Why Your Database Writes Are Fast and Your Reads Are Lying to You

#discuss #productivity #tools #webdev
Comments
34 min read
How I Tuned Adaptive Compression for Inverted Indexes and Stopped Wasting 40% of My Disk
ericwoooo_kr profile

How I Tuned Adaptive Compression for Inverted Indexes and Stopped Wasting 40% of My Disk

#discuss #productivity #tools #webdev
Comments
29 min read
Building a Docker-like Container From Scratch: What Actually Happens When You Run `docker run`
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Building a Docker-like Container From Scratch: What Actually Happens When You Run `docker run`

#ai #docker #machinelearning #devops
Comments
33 min read
Claude Code's Usage Policies: What Actually Blocks Your Workflow and How to Work Around It
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Claude Code's Usage Policies: What Actually Blocks Your Workflow and How to Work Around It

#discuss #productivity #tools #ai
Comments
35 min read
Shai-Hulud Malware in PyTorch Lightning: What Actually Happened and How to Check Your Environment
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Shai-Hulud Malware in PyTorch Lightning: What Actually Happened and How to Check Your Environment

#ai #machinelearning #productivity #tools
Comments
19 min read
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