firebase-js-sdk/repo-scripts/size-analysis

Modular Export Binary Size Calculator

The library supports two main features:

• Analyze the size of individual exports from a given package.
• Analyze the size of predefined bundle definitions. A bundle definition is a group of imports from different Firebase packages to support a certain use case. For example, to support Google signin and read from Firestore once.

Analyze the size of individual exports

CLI Usage

Flags

• --version Show version number [boolean]
• --inputModule, --im The name of the module(s) to be analyzed. example: --inputModule "@firebase/functions" "firebase/auth" [array]
• --inputDtsFile, --if Support for adhoc analysis. requires a path to dts file [string]
• --inputBundleFile, --ib Support for adhoc analysis. requires a path to a bundle file [string]
• --output, -o The location where report(s) will be generated, a directory path if module(s) are analyzed; a file path if ad hoc analysis is to be performed [string]
• --help Show help [boolean]

To Do Analysis On One or Multiple Firebase Packages

$firebase-js-sdk/repo-scripts/size-analysis ts-node-script cli.ts --im "@firebase/app" "@firebase/auth" -o <path to output DIRECTORY>.

To Do Analysis On All Firebase Packages

$firebase-js-sdk/repo-scripts/size-analysis ts-node-script cli.ts -o <path to output DIRECTORY>

Adhoc Support

$firebase-js-sdk/repo-scripts/size-analysis ts-node-script cli.ts --if <path to dts file> --ib <path to bundle file> -o <path to output FILE>

Use the Tool Programmatically

async generateReportForModule(moduleLocation: string): Promise<Report>

This function generates size analysis report for the given module specified by the moduleLocation argument.

@param moduleLocation: an absolute path to location of a firebase module

try {
  const moduleLocation: string = "absolute/path/to/firebase/module";
  const report: Report = await generateReportForModule(moduleLocation);
  console.log(report);


}catch (error) {


  console.log(error);
}

async generateReportForModules(moduleLocations: string[]): Promise<Report[]>

This function recursively generates a size analysis report for every module (and its submodules) listed in moduleLocations array

@param moduleLocations: an array of strings where each is a path to location of a firebase module

try {
  const moduleLocations: string[] = ['...module1', '...module2'];
  const reports: Report[] = await generateReportForModules(moduleLocations);
  console.log(reports);


}catch (error) {


  console.log(error);
}

async generateReport(name: string, dtsFile: string, bundleFile: string): Promise<Report>

Use this function for adhoc analysis. This function generates a size analysis report from the given definition file.

@param name: name to be displayed on the report

@param: dtsFile: absolute path to a definition file of interest.

@param bundleFile: absolute path to the bundle file of given definition file

try {
  const name: string = "adhoc";
  const dtsFile: string = '.../index.d.ts';
  const bundleFile: string = '.../index.esm2017.js';
  const report: Report = await generateReport(name, dtsFile, bundleFile);
  console.log(report);


}catch (error) {


  console.log(error);
}

Analyze the Size of Bundles

A bundle is defined by a bundle definition. A bundle definition is a group of imports from different Firebase packages to support a certain use case.

You can find some sample bundle definitions in the /bundle-definitions folder.

CLI Usage

To analyze bundles, you would use the command bundle: $firebase-js-sdk/repo-scripts/size-analysis ts-node-script cli.ts bundle [FLAGs].

Flags

• --input, or -i Path to the bundle definition file'

• --mode, or -m Possible values are npm and local

  • npm: analyze packages published to npm
  • local: ignore the version defined in bundle definition and analyze the corresponding local packages

• --bundler, or -b. Possible values are rollup, webpack, both. Decides which bundlers to be used to create bundles.

• --output, or -o The output file location of the bundle analysis result.

• --debug, or -d Enables the debug mode which output additional data in the bundle analysis result.