Log simple performance data from expect rule

[sandersn]

Write the data to a file with the same name in ~/.dts/perf/some-package-name.json. Consumers can then read the file and display information from there. Note that tslint rules are not expected to write files, so perhaps there's a better way to log this information.

types-publisher and dtslint-runner need to be updated to display the data. Here's a simple script that runs on the output of dtslint-runner:

const fs = require('fs');
const stats = require('stats-lite');
/** @type {Array<[string, number, number]>} */
let big = []
let types = []
for (const filename of fs.readdirSync('~/.dts/perf/', { encoding: "utf8" })) {
    /** @type {{ [s: string]: { typeCount: number, memory: number } }} */
    const x = JSON.parse(fs.readFileSync('~/.dts/perf/' + filename, { encoding: 'utf8' }))
    for (const k of Object.keys(x)) {
        big.push([k, x[k].typeCount])
        types.push(x[k].typeCount)
    }
}
console.log("{" + big.sort((a, b) => b[1] - a[1]).map(([name, count]) => ` "${name}": ${count}`).join(",") + "}")

console.log("99", stats.percentile(types, .99))
console.log("95", stats.percentile(types, .95))
console.log("90", stats.percentile(types, .90))
console.log("70", stats.percentile(types, .70))
console.log("50", stats.percentile(types, .50))

dtslint-runner can print this out or push the json to some data store. types-publisher needs an even smaller change in test-runner to look up and print the json files for each entry in changedPackages so that it shows up in the build output.

[andrewbranch]

💯

[andrewbranch]

💯