index.js

const core = require("@actions/core");

const fetch = (...args) => import("node-fetch").then(({ default: fetch }) => fetch(...args));

(async () => {
    try {
        const timeLimit = core.getInput("time-limit");
        const base = core.getInput("base");
        const endpoints = core.getInput("endpoints").split(" ");

        for (var endpoint of endpoints) {
            const time = Date.now();
            await fetch(`${base}${endpoint}`).then((data) => data.text());
            const timeTaken = Date.now() - time;
            if (timeTaken >= timeLimit) {
                core.setFailed(`The endpoint ${endpoint} took ${timeTaken}ms to respond when limit was set to ${timeLimit}ms.`);
            } else {
                core.info(`The endpoint ${endpoint} took ${timeTaken}ms to respond which is within the ${timeLimit}ms limit.`);
            }
        }
    } catch (err) {
        core.setFailed(err.message);
    }
})();