🐛 The process bootstrap slow when many routes

[huangciyin]

Fiber version
2.0.0
Issue description
When we have many routes(eg >1000), the process start very slow(>10s).
Bootstrap speed is important for serverless environment.
Code snippet

package main

import (
	"fmt"
	"log"
	"strconv"

	"github.com/gofiber/fiber/v2"
)

func main() {
	// Fiber instance
	app := fiber.New()

	for i := 0; i < 1000; i++ {
		url := "/b/" + strconv.Itoa(i)
		fmt.Println(url)
		app.Get(url, hello)
	}

	for i := 0; i < 1000; i++ {
		url := "/c/" + strconv.Itoa(i)
		fmt.Println(url)
		app.Get(url, hello)
	}

	// Routes
	app.Get("/", hello)

	// Start server
	log.Fatal(app.Listen(":3000"))
}

// Handler
func hello(c *fiber.Ctx) error {
	return c.SendString("Hello")
}

[ReneWerner87]

thanks for the report, we will have a look at it and already have an idea where the problem might be, if this is confirmed we can serve with a pull request in a few days, so it should probably be fixed in the next release.

[ReneWerner87]

We will work on it in the new year(january)

[ReneWerner87]

with 4002 handlers

with 2 handlers

you are right with the 4000 routes the start process takes quite a bit longer

I will try to optimize this

[ReneWerner87]

After my changed:
with 4002 handler -> from ~2.3seconds to ~4ms

PR here: #1134

with 4002 handlers:

with 2 handlers:

[Fenny]

https://github.com/gofiber/fiber/releases/tag/v2.4.0