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bench.ts
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bench.ts
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import Delaunator from 'delaunator';
import Constrainautor from './Constrainautor';
import cdt2d from 'cdt2d';
import os from 'os';
import {loadTests} from './delaunaytests/loader';
const COUNT = 100;
type P2 = [number, number];
type Triangulator = (points: P2[], edges: P2[]) => void
function triangulateCdt2d(points: P2[], edges: P2[]){
cdt2d(points, edges);
}
function triangulateCon(points: P2[], edges: P2[]){
const del = Delaunator.from(points),
con = new Constrainautor(del);
con.constrainAll(edges);
}
export function fmtTime(ns: number | bigint){
return Number((BigInt(ns) / 1000n) | 0n);// + ' μs';
}
export function median(arr: number[] | bigint[]){
const half = (arr.length / 2) | 0;
return arr.length % 2 ? (BigInt(arr[half]) + BigInt(arr[half + 1])) / 2n : arr[half];
}
export function summarizeTimes(times: bigint[]){
times.sort((a, b) => a < b ? -1 : 1);
return {
min: fmtTime(times[0]),
max: fmtTime(times[times.length - 1]),
median: fmtTime(median(times)),
mean: fmtTime(times.reduce((a, b) => a + b, 0n) / BigInt(times.length))
};
}
function benchOne(count: number, json: {points: P2[], edges: P2[], error?: string}, triangulate: Triangulator){
if(json.error){
return;
}
const points = json.points,
edges = json.edges,
times: bigint[] = [];
// warmup
triangulate(points, edges);
triangulate(points, edges);
for(let i = 0; i < count; i++){
const start = process.hrtime.bigint();
triangulate(points, edges);
const end = process.hrtime.bigint();
times.push(end - start);
}
return summarizeTimes(times);
}
function benchFiles(files: ReturnType<typeof loadTests>, count: number, triangulate: Triangulator){
const results = [];
for(const json of files){
//const json = JSON.parse(fs.readFileSync(file, 'utf8'));
if(!json.error){
results.push({
name: json.name,
points: json.points.length,
edges: json.edges.length,
...benchOne(count, json, triangulate)
});
}
}
console.table(results);
}
function main(args: string[]){
const files = loadTests(false);
//args = args.length ? args : files;
console.log("Benchmarked on", os.cpus()[0].model, "with",
COUNT, "triangulations per file. Times in µs.");
//console.log("cdt2d");
//benchFiles(files, COUNT, triangulateCdt2d);
console.log("Constrainautor");
benchFiles(files, COUNT, triangulateCon);
}
main(process.argv.slice(2));