Technical Guide EUC-JP, UTF-16, and a Suspicion of EBCDIC — Reading Legacy Encodings in 2026
A log file from 1998 lands on your desk. grep ERROR returns nothing. The file is 12 GB, and you can see the wo…
Log Analysis
Technical Guide 
Technical Guide Making the On-Call Night Lighter — Four Things You Set Up for Your 2 A.M. Self
2:14 a.m. Ninth reopen. The same 50 GB log, opened nine times tonight already. Why does investigation turn int…
Technical Guide Look at It Before You Feed It to jq — Four Times You Need the Raw Bytes
jq ate 12 GB and died. The input was an 8 GB JSON log. jq is supposed to stream records one at a time, so why…
Technical Guide Chasing an Outage by the Clock — Four Ways to Use Timestamps as Evidence
All you have is 14:07. That's the whole report. No error message, no request ID, no reproduction steps. A few…
Technical Guide The Day printf Debugging Hit 10GB — Four Ways to Live With Development Logs
10GB, waiting for me in the morning. It came from one printf I dropped into a loop before going to bed. Almost…
Technical Guide The Night the Log Wouldn’t Read — Four Character-Encoding Traps and How to Tell Them Apart
[Update, 16 October 2026] Speed today — Shift-JIS, EUC-JP and UTF-16 can now be searched fast through an index…
Technical Guide I Replaced 21,994 Occurrences in a 10GB, 100-Million-Line File in 16.8 Seconds. It Cost 3.7MB
This is what happened when UwView Pro's Edit Upgrade — Huge Files, No Rewriting was pointed at a 100-million-l…
Technical Guide You Found the ERROR. You Still Can’t Find the Cause — Four Ways to Trace Causality in Logs
--> grep ERROR worked. The red line is right there on your screen. And the "root cause" field in your report i…
Technical Guide “This File Is Too Large to Open” — Four Go-To Tools That Sink Under Huge Files, and What Comes Next
[Update, 16 October 2026] Speed today — 50 GB is about the same; even at 3 GB, the gap now opens from the seco…
Comparison Opening a 48 GB File Isn’t the Same as Investigating It — EmEditor vs UwView Pro on a 16 GB-RAM Laptop
"Find a specific string in this 48 GB file." When you get that request, what matters is not just "does the sof…