frank chu - DEV Community

frank chu

Oct 25

Reylo types .sql files by asking your database. I tried to fool it five ways.

#backend #database #sql #typescript

5 min read

frank chu

Oct 25

Goose claims a 29-byte record and 3.3x over C++. I measured both.

#computerscience #cpp #performance #programming

5 min read

frank chu

Oct 24

OpenAI shipped a php2shell checker. I ran it against 65 sites. All 65 said UNKNOWN.

#node #openai #php #security

1

4 min read

frank chu

Oct 24

HatchZip promises to extract an 839 MB archive in 839 MB of disk. I measured the blocks.

#github #opensource #performance #software

5 min read

frank chu

Oct 24

Astral wired ty into uv. I ran uv check on a project with four deliberate errors.

#programming #python #softwaredevelopment #tools

5 min read

frank chu

Oct 24

I scanned my machine for the Brotli RCE. Three stacks were exposed — and the patched one still reports the vulnerable version.

#cybersecurity #node #python #security

7 min read

frank chu

Oct 23

I generated 1,000,000 UUIDv7s. Python's are perfectly monotonic — in one process, with a behaving clock.

#programming #python #softwaredevelopment

1

6 min read

frank chu

Oct 23

I measured softmax's precision cliff. In fp32, cross-entropy returns exactly zero at margin 16.

#ai #computerscience #machinelearning #performance

7 min read

frank chu

Oct 23

Quad9 is leaving France on Nov 24. I probed its DoH — it's the only resolver here that requires HTTP/2 or nothing.

4 min read

frank chu

Oct 23

OpenSSL 4.1.0 shipped today. I built it and measured ML-KEM, ML-DSA, and DTLS 1.3.

#networking #opensource #performance #security

4 min read

frank chu

Oct 22

eMudhra quit the CA business today. I checked your trust store — its roots are still in it.

#cybersecurity #infosec #security

4 min read

frank chu

Oct 22

I built OpenShell's Z3 policy prover and ran 29 checks. It caught everything except the metadata address.

#agents #cli #opensource #security

5 min read

frank chu

Oct 22

Python 3.15's lazy imports cut my test CLI from 164 ms to 28 ms. The cost didn't disappear — it moved.

#cli #performance #python

4 min read

frank chu

Oct 22

I built FoxIO's 54 KB HTTP/3 accordion by hand. aioquic's decoder unfolded it to 200 MB.

#cybersecurity #networking #python #security

5 min read

frank chu

Oct 21

LiteLLM 1.107.0 stole credentials from every Python process. I checked PyPI and reproduced the mechanism with a canary

5 min read

frank chu

Oct 21

DuckDB 2.0 shipped today. I ran its headline features — triggers work, VARIANT has a silent-NULL trap

#cli #database #python #sql

5 min read

frank chu

Oct 21

I installed Google's TorchTPU wheel — 969MB — on a machine with no TPU and ran the README example

#news #ai #machinelearning #python

5 min read

frank chu

Oct 21

PHP's 9.2 RCE fix was public for three days before the release. I read all 11,747 lines of it.

1

5 min read

frank chu

Oct 21

Cloudflare says its Rust TypeScript port is 8x faster. I measured 5.3x — and 72% less memory.

#performance #programming #rust #typescript

5 min read

frank chu

Oct 21

Eight CA private keys were integers under 256. I recovered all eight in 11 milliseconds.

#cybersecurity #infosec #security

1

6 min read

frank chu

Oct 20

WhatsApp's help pages hid instructions for AI. I probed the live pages with 7 user-agents.

#ai #privacy #security

4 min read

frank chu

Oct 20

DeepSeek open-sourced its production inference engine today. I counted what's in it — and what's not.

#ai #llm #opensource #python

4 min read

frank chu

Oct 19

Mistral shipped a time-series foundation model today. I measured its latency — and its confidence.

#ai #datascience #machinelearning #performance

1

2

4 min read

frank chu

Oct 19

GhostAction now scans your git history for secrets. I deleted 30 keys and recovered all 30.

#cybersecurity #git #github #security

5 min read

frank chu

Oct 19

One hash is enough for a Bloom filter. I measured it — and the 52% cliff when you break its one rule.

4 min read

frank chu

Oct 19

Someone built a programming language to break LLMs. I ran it.

#ai #llm #programming

6

1

4 min read

frank chu

Oct 18

OpenCode's breach exposed provider keys for 1.4% of Console users. I checked what that number can and can't tell you.

#api #cybersecurity #llm #security

4 min read

frank chu

Oct 18

DeepSeek charges $0.75 per 1,000 searches. I probed what 'successful' means.

#ai #api #llm #tools

4 min read

frank chu

Oct 18

I built an attention head out of a 1982 associative memory and measured where it breaks

#ai #computerscience #deeplearning #machinelearning

4 min read

frank chu

Oct 18

DeepSeek swapped its Flash model overnight. I pulled the new config and did the cache math.

#ai #llm #opensource

5 min read

frank chu

Oct 10

I proposed a shelf life for published claims. A reader showed me I was measuring the wrong variable.

#discuss #testing #career #writing

2

4 min read

frank chu

Oct 10

dev.to's API has no DELETE. It has PUT published:false, which the docs never mention.

#api #python #webdev #programming

4 min read

frank chu

Oct 10

A reader asked if a word-count floor would fix my linter. I measured it, and it fixes a different bug.

#javascript #testing #tooling #writing

5 min read

frank chu

Oct 4

Which check in your pipeline has never fired?

#discuss #testing #devops #career

1

4 min read

frank chu

Oct 4

I merged six checkers into one script. It found a real bug and committed one, on the same run.

#python #testing #tooling #programming

5 min read

frank chu

Oct 4

I published the same two posts twice and didn't notice for a month

#api #python #reliability #programming

4 min read

frank chu

Oct 1

How long do you keep a published claim provisional?

#discuss #career #writing #testing

1

4 min read

frank chu

Oct 1

dev.to re-encodes and crops your cover image, and I measured exactly where the crop lands

#webdev #images #performance #python

4 min read

frank chu

Oct 1

My writing linter can be defeated by writing more. I measured how much more.

#javascript #testing #writing #tooling

1

5 min read

frank chu

Sep 29

Every checker I wrote this month had the same bug: it could not tell using a word from talking about one

#discuss #programming #testing #tooling

4 min read

frank chu

Sep 29

A server sent me Retry-After: 0 and my retry loop lost its brakes

#python #api #reliability #programming

5 min read

frank chu

Sep 29

The Server header told me which layer rejected my request, and it wasn't the one I was debugging

#python #api #debugging #webdev

4 min read

frank chu

Sep 27

Five things I read in an HTTP response before I read the status code

#api #debugging #python #webdev

4 min read

frank chu

Sep 27

77% of the Python I published references names it never defines

#python #programming #writing #testing

4 min read

frank chu

Sep 27

I have the same boolean in 94 files. It is wrong in 90 of them.

#python #programming #testing #devops

4 min read

frank chu

Sep 25

My linters have never found a real bug in my posts. Readers have found two.

#discuss #testing #programming #career

3 min read

frank chu

Sep 25

I published a benchmark. Two weeks later the same code ran 2.5x faster.

#performance #testing #python #programming

4 min read

frank chu

Sep 25

If a list endpoint returns exactly as many rows as you asked for, you have a bug

#python #api #programming #testing

3 min read

frank chu

Sep 21

Reading the Jev SDK source instead of the launch post

#python #api #ai #programming

5 min read

frank chu

Sep 21

Everyone is quoting Jev's benchmarks. Here's what you can check without a key.

#ai #python #api #programming

6 min read

frank chu

Sep 19

The best comment I ever got was someone proving my code wrong

#discuss #programming #career #testing

3 min read

frank chu

Sep 19

Same platform, two image transforms, opposite rules for how to author them

#webdev #performance #programming #css

4 min read

frank chu

Sep 19

A commenter told me to render retina covers. I measured what the CDN does with them.

#webdev #performance #python #programming

3 min read

frank chu

Sep 18

How long would you obey a rule your tooling never actually enforced?

#discuss #programming #testing #career

2 min read

frank chu

Sep 18

dev.to stores your front matter twice, and a body edit can rewrite your title

#python #api #webdev #programming

3 min read

frank chu

Sep 18

My writing score went from 1 to 17 without touching a word of the article

#python #testing #writing #programming

3 min read

frank chu

Sep 18

Your agent's rules file is 3,000 tokens and half of it is archaeology

#discuss #ai #agents #productivity

1

2 min read

frank chu

Sep 18

Three checkers I wrote, one bug: none of them can tell a mention from a use

#programming #testing #javascript #python

3 min read

frank chu

Sep 18

Two constants in my linter were dead. I obeyed them for three weeks.

#javascript #testing #programming #writing

3 min read

frank chu

Sep 17

What's the dumbest thing your AI confidently got wrong this week?

#discuss #ai #productivity #programming

2 min read

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