import throttle from 'lodash/throttle' is actually better at reducing bundle size than 'lodash.throttle'

[jedwards1211]

See https://github.com/lodash/lodash/issues/3838

If two lodash per-method packages, e.g. lodash.throttle and lodash.debounce, depend on an underlying lodash function (public or internal API), that function will be inlined in each of the modular build packages, bloating webpack bundle size. The modular build packages can't share any code.

On the other hand, if your package imports from lodash/throttle, and another package imports from lodash/debounce, they can share any underlying code they depend on and the webpack bundle will be smaller.

So the per-method packages really have no advantages, and John-David Dalton pointed out that they're going to be removed in v5.

Having lodash as a dependency is perfectly fine as long as you always import from submodules, never its root module.

[jedwards1211]

Here's a demonstration of this. Since throttle uses debounce internally, importing lodash/throttle and lodash/debounce is able to share the debounce code and make a smaller bundle. But if you import lodash.throttle and lodash.debounce, the debounce code is duplicated internally in lodash.throttle, making a bigger bundle.

lodash-submodules.js

import throttle from 'lodash/throttle'
import debounce from 'lodash/debounce'

webpack lodash-submodules.js

sset      Size  Chunks             Chunk Names
main.js  3.79 KiB       0  [emitted]  main
Entrypoint main = main.js
[4] ./lodash-submodules.js 78 bytes {0} [built]
[8] (webpack)/buildin/global.js 472 bytes {0} [built]
    + 13 hidden modules

lodash-per-method-packages.js

import throttle from 'lodash.throttle'
import debounce from 'lodash.debounce'

webpack lodash-per-method-packages.js

  Asset      Size  Chunks             Chunk Names
main.js  4.55 KiB       0  [emitted]  main
Entrypoint main = main.js
[0] (webpack)/buildin/global.js 472 bytes {0} [built]
[1] ./lodash-per-method-packages.js 78 bytes {0} [built]
    + 2 hidden modules

[hems]

thanks for the info