Jonah Merriam jonah_thegreat
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Overview Repositories
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Jonah Merriam (jonah_thegreat)

Forgejo Website LinkedIn GitHub UConn CS C17 & ASM

CS student at the University of Connecticut ('27).
I write C: virtual machines, allocators, interpreters, and runtime tooling.

Featured Projects

Project Description Stack
cortex-vm 64-bit word-addressed virtual machine, assembler, and round-tripping disassembler. Features M & F extensions, heap allocation, and ~400M instr/sec execution speed at -O3. C17 VM ISA
ReMem High-performance memory recycler and garbage collector for C. Uses size-classed arenas and O(1) page indexing to reduce fragmentation and allocation overhead. C Memory GC
forth Forth 2012 Core-compliant interpreter and switch-threaded bytecode VM on an arena. Features CREATE/DOES>, longjmp REPL recovery, and 180+ passing tests. C Bytecode Forth
arena Zero-dependency shunting arena allocator designed for sequential, high-speed, fragmentation-free memory allocation. C Allocators
cliargs Lightweight, portable CLI argument parser for C supporting short/long flags, subcommands, typed getters, and environment variable fallbacks. C CLI Tooling
cortex-projects Target programs, toolchain experiments, and bytecode suites written for the Cortex VM architecture. C Assembly

Focus & Principles

  • Systems & Languages: C (C99/C11/C17), x86_64 / ARM64 assembly, Forth, Python, Bash
  • Virtual Machines & Runtimes: Word-addressed architectures, bytecode VMs, switch-threaded interpreters, single/two-pass assemblers
  • Memory Management: Linear arenas, size-classed page recyclers, O(1) indexing, zero fragmentation
  • Mechanical Sympathy: Designing for predictable cache behavior, sequential access, and zero external runtime dependencies

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