Why do packages take a long time to load?

Question

npm

Please advise what can be done in this situation.
Internet speed 100 Mbps.
Ping is low.
But when I download packages, 100 MB downloads for about 3 minutes, before it downloaded in 20 seconds.

{
  "name": "lesson-1",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "scripts": {
    "start": "node_modules\\.bin\\webpack-dev-server",
    "build": "node_modules\\.bin\\webpack"
  },
  "devDependencies": {
    "babel-cli": "^6.26.0",
    "babel-plugin-styled-components": "^1.5.1",
    "babel-preset-env": "^1.6.1",
    "babel-preset-react": "^6.24.1",
    "css-loader": "^0.28.11",
    "eslint-config-airbnb": "^16.1.0",
    "eslint-plugin-import": "^2.11.0",
    "eslint-plugin-jsx-a11y": "^6.0.3",
    "eslint-plugin-react": "^7.7.0",
    "file-loader": "^1.1.11",
    "image-webpack-loader": "^4.2.0",

    "node-sass": "^4.9.0",
    "react-css-modules": "^4.7.2",
    "sass-loader": "^7.0.1",
    "style-loader": "^0.18.2",
    "webpack": "^4.6.0",
    "webpack-dev-server": "^3.1.3"
  },
  "dependencies": {
    "babel-loader": "^7.1.4",
    "babel-polyfill": "^6.26.0",
    "babel-preset-react-hmre": "^1.1.1",
    "classnames": "^2.2.5",
    "eslint": "^4.19.1",
    "extract-text-webpack-plugin": "v4.0.0-beta.0",
    "babel-cli": "^6.26.0",
    "html-webpack-plugin": "^3.2.0",
    "react": "^16.3.2",
    "react-dom": "^16.3.2",
    "react-router-dom": "^4.2.2",
    "url-loader": "^1.0.1"
  }
}