Tracing `require()`s

A new TraceEvents object is created in:
perftrace/docs/examples/tracing-requires/index.js
Line 4 in 7cb1ce3
const traceEvents = new TraceEvents();
Before the process exits, the TraceEvents object is destroyed and the trace events are stringified and printed to events.json in:
perftrace/docs/examples/tracing-requires/index.js
Lines 6 to 10 in 7cb1ce3
    
           process.on("beforeExit", () => { 
        
             const events = traceEvents.getEvents(); 
        
             traceEvents.destroy(); 
        
             writeFileSync("events.json", JSON.stringify(events)); 
        
           });
The require() calls can be tracked by passing true to trackRequires() like it is being done in:
perftrace/docs/examples/tracing-requires/index.js
Line 12 in 7cb1ce3
trackRequires(true);
After running node . and opening http://localhost:3000 in your browser, the generated events.json file can be opened on https://ui.perfetto.dev for visualization:
Name		Name	Last commit message	Last commit date
parent directory ..
.gitignore		.gitignore
README.md		README.md
index.js		index.js
package-lock.json		package-lock.json
package.json		package.json
perfetto.png		perfetto.png
	process.on("beforeExit", () => {
	const events = traceEvents.getEvents();
	traceEvents.destroy();
	writeFileSync("events.json", JSON.stringify(events));
	});