@malharmorey

Malhar Morey

@malharmoreyPune, IndiaJoined July 2026

JavaScript internals, side projects, and the bugs in between.

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Malhar Moreymalharmorey.hashnode.dev2 posts

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MMMalhar Moreymalharmorey.hashnode.devJun 24 · 8 min read

AI Output Is Untrusted Input: How ext0 Lets an LLM Query Your Database

TL;DR: ext0 is a TypeScript engine that turns plain-English requests into database reports. The interesting part is not the LLM. It is everything wrapped around it. Every generated query passes throug

MMMalhar Moreymalharmorey.hashnode.devApr 2 · 8 min read

PACKED to HOLEY: How JS Arrays Fall Down the Optimization Ladder

TL;DR: V8 gives every array a hidden type. Arrays with no gaps (packed) are fast. Arrays with gaps (holey) are slow, and an array can move from fast to slow but never back. On my machine, a holey arra

Malhar Morey

About

Available for

Malhar Morey's blogs

Recently published

AI Output Is Untrusted Input: How ext0 Lets an LLM Query Your Database

PACKED to HOLEY: How JS Arrays Fall Down the Optimization Ladder

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Malhar Morey

About

Available for

Malhar Morey's blogs

Recently published

AI Output Is Untrusted Input: How ext0 Lets an LLM Query Your Database

PACKED to HOLEY: How JS Arrays Fall Down the Optimization Ladder