awslabs/llrt

Features

• Low-Latency JavaScript Execution - Executes JavaScript applications in a lightweight environment specifically optimized for low-latency serverless execution.
• JavaScript Runtimes - Provides a lightweight JavaScript runtime based on QuickJS optimized for efficiency and fast startup.
• Native SDK Integration - Bakes high-performance cloud service clients directly into the runtime binary to eliminate external dependency loading.
• Serverless Execution Environments - Provides an optimized runtime environment for event-driven, ephemeral code execution across various architectures.
• Cloud Native Application Development - Provides a runtime optimized for building and executing cloud-native serverless applications.
• Native SDK Binaries - Bakes natively optimized cloud service SDKs directly into the runtime binary to remove dependency loading overhead.
• Serverless Function Executions - Runs asynchronous handler functions to process events in a low-latency serverless environment.
• Function Warm-up Utilities - Initializes network connections in parallel during startup to eliminate cold-start latency for initial requests.
• Native Binary Packagers - Bundles cloud service clients into the runtime binary as part of the native binary packaging to eliminate cold starts.
• Parallel Connection Warming - Initializes TLS and network connections in parallel during startup to remove handshake latency from the first request.
• Cloud Native Runtimes - Acts as an execution layer that bundles native cloud clients and network optimizations to accelerate function initialization.
• Cold Start Optimizations - Reduces cold start latency through parallel connection warming and the use of lightweight binaries.
• Connection Warming - Reduces TLS latency by initializing secure connections in parallel during the runtime startup phase.
• Asynchronous Event Loops - Implements a custom event-driven execution model designed specifically for low-latency serverless workloads.
• QuickJS-Based Runtimes - Uses the QuickJS engine to provide a lightweight environment with fast startup and low memory overhead.
• Low-Latency Execution - Optimizes JavaScript execution for minimal memory usage and fast startup times in serverless environments.
• Serverless Workload Execution - Executes ES2023 JavaScript workloads with a focus on minimal memory footprint and low latency.
• Configurable Garbage Collection - Implements configurable garbage collection thresholds to prevent memory exhaustion in constrained serverless environments.
• Cloud Service SDKs - Bundles specific cloud service clients and endpoints into the runtime to reduce initialization time.
• Local Function Execution - Provides utilities to run serverless functions locally using mock events to emulate cloud environments.
• Native SDK Bundling - Bakes native implementations of cloud service clients into the runtime to reduce cold starts and binary size.
• AWS API Clients - Integrates high-performance AWS API clients directly into the runtime to reduce cold start latency.
• Application Cloud Deployments - Supports packaging application code into container images for deployment to cloud hosting environments.
• Infrastructure Deployment - Includes dedicated construct libraries to automate the deployment of serverless functions via infrastructure as code.
• Serverless Deployment - Provides tools to package and deploy code to event-driven serverless cloud environments.
• Garbage Collection - Implements configurable garbage collection thresholds to reclaim memory and prevent application crashes in serverless environments.
• Memory-Threshold GC Tuning - Allows configuring memory limits that force the garbage collector to run and prevent memory exhaustion.
• Embedded JavaScript Interpreters - Utilizes an embedded QuickJS interpreter to provide a high-performance, small-footprint environment.
• JavaScript and Web-Standard - Supports development of small-footprint applications using ES2023 and essential web-standard APIs.
• API Polyfills - Provides embedded polyfills for standard web APIs to ensure compatibility with common JavaScript libraries.
• Resource Limit Configurations - Allows configuration of memory limits and idle socket timeouts to ensure stable system performance.
• Function Monitoring - Provides a CLI to fetch and filter execution logs from deployed serverless functions.
• Memory Usage Analyzers - Computes detailed memory statistics, including object and string counts, to monitor runtime resource usage.
• Garbage Collection Triggers - Forces garbage collection when a configurable memory threshold is reached to prevent crashes in constrained environments.
• Built-in Testing Frameworks - Includes an integrated, lightweight testing framework for verifying functions with standard assertions.

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