Zero Heap Allocations at 1.18 GB/s: Deep Dive into ForgeZero 4.0.x

Source: Dev.to

Performance Metrics

goos: linux
goarch: amd64
BenchmarkHadesEngine/Process100MB-8   14   78411200 ns/op   0 B/op   0 allocs/op

By completely avoiding heap allocations on critical execution paths, ForgeZero bypasses Go’s garbage collector entirely, achieving deterministic latency similar to C or Rust.

Architecture Overview

ForgeZero’s compiler architecture relies on three internal layers. The file‑system sub‑engine (fs, seal, and the linker/assembler modules) was fully overhauled to eliminate heap allocations.

File System Sub‑Engine

• Pre‑allocated memory arenas and sliding ring buffers.
• Handles path strings via direct string → []byte headers (unsafe.Pointer), dodging typical heap allocation penalties.
• No new byte slices or strings are created during recursive scans.

Dynamic Parallelization

• Single file: matches input files directly to object targets.

  fz -asm boot.asm

• Directory: parses whole structures recursively.

  fz -dir ./src

Link‑Level Degradation System

• Try GCC compilation.
• Fallback to gcc -no-pie if position‑independent execution fails.
• Degrade cleanly to a bare ld link for completely naked environments.

For strict bare‑metal control, developers can override automated link behaviors via targeted CLI flags:

• -mode c — explicitly lock execution through GCC.
• -mode raw — bypass safety overrides and link unmanaged binaries directly with raw ld.

Patch 4.0.1 Highlights

• Silent‑by‑Default Pipeline – Errors are trapped and viewable in full via the -verbose flag; successful builds display a clean single‑line state block (e.g., Built: program.out).
• Collision Resolution – main.asm and main.s now map correctly to independent main_asm.o and main_s.o components without cross‑contamination.
• Garbage Cleanup – Clean runtime structures ensure all cross‑compilation objects (.fz_objs temporary workspaces) are recursively pruned using zero‑allocation OS system calls.

Installation

# Pull the latest bare‑metal builder package directly via Go
go install github.com/forgezero-cli/forgezero@latest

Make sure your underlying assembly tools (nasm, fasm, ld, etc.) are globally available in your system $PATH.

Explore the fully‑tested source tree, architecture specs, and documentation at the official ForgeZero GitHub repository.