If your current scripts in Bash, Python, or JavaScript feel too heavy, fragile, or slow to start, Vfly Script offers a compelling, purpose-built alternative. Note: As of early 2026, Vfly Script is an emerging technology. Always refer to the official documentation for the latest syntax, APIs, and stability guarantees.
1. Introduction Vfly Script (commonly known as Fly Script ) is a lightweight, high-performance scripting language and runtime environment designed primarily for automation, task orchestration, and rapid tooling in cloud-native and edge computing environments. Its name derives from "Velocity Fly," emphasizing speed and minimal overhead.
vfly run script.vfly --allow-net=api.example.com:443 --allow-read=/tmp Logs are automatically emitted as JSON with trace IDs, making them compatible with Loki, DataDog, or Splunk. Vfly Script -Fly Script---
log.info("User action", user_id: 123, action: "login") For transient failures, Vfly can record a deterministic execution trace and replay it locally — invaluable for serverless debugging. 5. Common Use Cases | Domain | Example Application | |-------------------------|----------------------------------------------------------------| | CI/CD Pipelines | Lightweight replacement for Bash + jq + curl in GitHub Actions| | API Glue Code | Transform, route, or authenticate requests in an API gateway | | Edge Computing | Run sensor data validation on Raspberry Pi or industrial PLCs | | Database Migrations | Versioned, idempotent schema change scripts (built-in retries) | | Webhook Handlers | Process Stripe/GitHub webhooks with minimal cold-start lag | 6. Performance Benchmarks (Approximate) | Operation | Vfly Script | Python 3.11 | Node.js 20 | |-------------------------------|-------------|-------------|------------| | Startup time (empty script) | 1.2 ms | 38 ms | 52 ms | | JSON decode (1 MB) | 3.5 ms | 8.1 ms | 4.2 ms | | HTTP GET + JSON parse | 12 ms | 29 ms | 18 ms | | Memory footprint (idle) | 2.4 MB | 18 MB | 32 MB |
Unlike general-purpose languages (Python, JavaScript, Go), Vfly Script is intentionally restricted and optimized for — often used in CI/CD pipelines, serverless functions, API gateways, and IoT edge devices. 2. Core Characteristics | Feature | Description | |-----------------------|-----------------------------------------------------------------------------| | Interpreted | No compilation step; executes directly from source via a small VM. | | Memory-safe | Automatic garbage collection with bounded heap (no unbounded allocation). | | Concurrency Model | Actor-based (like Erlang) or async/await (configurable). | | Type System | Dynamic with optional gradual typing ( .vfly files support type hints). | | Standard Library | Minimal: HTTP client, file I/O, JSON, regex, timers, process spawning. | | Embeddable | Can be embedded into Go, Rust, or C++ applications as a scripting engine. | 3. Language Syntax (Example) // Vfly Script sample: HTTP request + JSON processing import http import json If your current scripts in Bash, Python, or
data = json.decode(resp.body) total = 0 for num in data.numbers total += num
func fetch_and_sum(url string) int resp = http.get(url, timeout: 2_000) if resp.status != 200 return -1 vfly run script
return total
// Entry point (optional, runs automatically) task main() result = fetch_and_sum("https://api.example.com/numbers") println("Sum: (result)")