Slow init/require

[chyzwar]

Environment

• OS Version: ubuntu 20.04
• Node.js Version: 16.0.0

Actual behavior

var glob = require("fast-glob");
console.log('glob', glob)

$ time node index.js 
glob [AsyncFunction: FastGlob] {
  sync: [Function: sync],
  stream: [Function: stream],
  generateTasks: [Function: generateTasks],
  isDynamicPattern: [Function: isDynamicPattern],
  escapePath: [Function: escapePath]
}

real    0m0,127s
user    0m0,090s
sys     0m0,013s

time node index.js

Expected behavior

Should have similar require time as glob package.

var glob = require("glob");
console.log('glob', glob)

time node index.js
glob <ref *1> [Function: glob] {
  sync: [Function: globSync] { GlobSync: [Function: GlobSync] },
  GlobSync: [Function: GlobSync],
  glob: [Circular *1],
  hasMagic: [Function (anonymous)],
  Glob: [Function: Glob]
}

real    0m0,082s
user    0m0,065s
sys     0m0,015s

Steps to reproduce

create index.js file and time execution time.
When using fast-glob in cli tools, require/init time is dominating runtime performance. Only when globing large directories, fast-glob is faster. fast-glob is slower by 50ms when starting process.

[mrmlnc]

Some performance optimizations merged into the main branch.

#428