Is there any way to fix either of these? Thanks in advance. $ echo "if(1)x=x+1" | uglifyjs -comment all It seems to interpret any option as a filename and then throw an error when it can't find it. I also have the apt-get install in /usr/bin/uglifyjs, and it does minify JavaScript, but none of the command-line options work. $ echo "if(1)x=x+1" | /usr/local/bin/uglifyjs First I have the npm-installed command in /usr/local/bin/uglifyjs, which does nothing: $ /usr/local/bin/uglifyjs -version I've uninstalled them and reinstalled them both multiple times, and at this point I have two installations, neither of which work, or even tell me what version they are. Some sources say you can just apt-get install node-uglify. Some sources say to install npm and then use npm install uglify-js -g. To achieve the best performance, use AWS SDK V3, bundle and minify your code, and avoid top-level imports.įor more serverless learning resources, visit Serverless Land.I want to install Uglify in order to minify JavaScript files on the command line. You also learned how to provide a different version of AWS SDK for JavaScript and that dependencies and how they are imported affects the performance of Node.js Lambda functions. In this post, you learn how to improve Node.js cold start performance by up to 70% by bundling and minifying your code. The minified and bundled v3 version has about 1.7x faster cold starts, while also providing faster performance during warm invocations. The cold start invocations for DdbV3X86 run in 551 ms versus DdbVZTopLevelX86Unbundled, which run in 945 ms (p90). View results in CloudWatch Insights by selecting the two functions’ log groups and running the following query: Create a “build” script in the script section of the package.json file: "scripts": ' loadtest.yml Add esbuild to your dev dependencies using npm or yarn:Ģ. This is one of the fastest JavaScript bundlers available, often 10-100x faster than alternatives like WebPack or Parcel.ġ. You can bundle and minify Lambda functions by using esbuild. Terser is available on NPM, and can be installed in your project with npm. Bundle and minify Node.js Lambda functions Minify your JavaScript source code with our interactive web interface for. Since there is a separate package for each service, top-level import is not possible, which further increases startup performance.īy providing your own AWS SDK, it can also be bundled and minified during the build process, which can result in cold start reduction. It also includes many frequently requested features, such as a first-class TypeScript support and a new middleware stack. This has many benefits, including faster installations and smaller deployment sizes. Consider using AWS SDK V3, which uses a modular architecture with a separate package for each service. To control the version of the SDK that you depend on, you must provide it yourself. The documentation shows that all Node.js runtimes share the same AWS SDK for JavaScript version. Import DynamoDB from "aws-sdk/clients/dynamodb"Ĭonst DynamoDB = require("aws-sdk/clients/dynamodb") Use path imports if your library supports it: //es6 Even though modern JavaScript bundlers such as esbuild, Rollup, or WebPack uses tree shaking and dead code elimination, importing dependencies via wildcard, global-, or top-level imports can result in larger bundles. You should also evaluate what’s being imported. Including files in a project that are not imported or used has minimal effect on startup performance. This only impacts imported and used code. The more dependencies and files that are imported in a function, the longer it takes to initialize. If that file or dependency in turn contains other imports or require statements, the process repeats, which causes disk reads. Once it finds the resource, it is loaded from disk, parsed and run. build: tsc -declaration & npm run minify. When you require or import a resource in your code, Node.js tries to resolve that resource by either the file- or directory name, or in the node_modules directory. Unfortunately, the TypeScript compiler not only cannot produce minified output, it proactively wastes. This post shows how to bundle and minify Lambda function code to optimize performance and stay up to date with the latest version of your dependencies. Consequently, it’s important to keep the dependencies to a minimum and optimize the ones in use. Node.js reads and parses all dependencies and sources that are required or imported from the entry point. Since Node.js parses, optimizes and runs JavaScript on-the-fly, it can provide fast startup and low overhead in a serverless environment. This post is written by Richard Davison, Senior Partner Solutions Architect.ĪWS Lambda offers support for Node.js versions 12, 14 and recently announced version 16.
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