feat(medusa): Improve product update performances

[adrien2p]

• create 15 products during setup, each product has 50 variants with each a pricing
• in each request, update the amount of each price for each variant of the product being updated

For simple cases where no props on the variants need to be updated or the prices amount did not changed, the update are avoided and therefore also improve by removing unnecessary steps in the flow.

A few methods have been migrated to bulk to avoid unnecessary queries and reduce the amount of those queries.

Other improvements have been added overall and you can look at the pr itself to get a better understanding.

NOTE
https:/medusajs/medusa-staging/pull/14

Test

// load testing config
export const scenarios = {
  scenarios: {
    updateProductVariantPrices: {
	  executor: 'ramping-arrival-rate',
	  startTime: '3s',
      startRate: 5,
      timeUnit: '1s', // we start at 5 iterations per second
	  stages: [
        { target: 15, duration: '5s' },
        { target: 15, duration: '5s' },
        { target: 0, duration: '5s' },
      ],
      preAllocatedVUs: 20,
      maxVUs: 50, // if the preAllocatedVUs are not enough, we can initialize more
      exec: "updateProductVariantPrices_"
    }
  }
};

The tests have been ran on a single instance on my local machine, the important thing to look at is the factor between
before/after more than the numbers themselves as it can change depending on the resources.

--

The data used are the same shape for both tests against master and against the pr

• 15 products created
• 50 variants per product
• 1 price per variant
  Each request will update one product including all the variants and update the price of each variant, the data looks like this

// data to update in the post body
{
  variants: [
    // 49 other variants
    {
      id: ...,
      prices: [{
        currency_code: "usd",
        amount: 20000,
      }]
    }
  }]
}

You can see the results in the images with left (master) and right (the pr)

RESOLVE CORE-1208

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Name	Status	Preview	Comments	Updated
medusa-docs	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Mar 15, 2023 at 3:38PM (UTC)

[changeset-bot]

🦋 Changeset detected

Latest commit: 63102bf

The changes in this PR will be included in the next version bump.

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[adrien2p]

@olivermrbl once bulk emit is merged, I ll be able to update that pr with it

[adrien2p]

self-review: Here only the amount changed, this is why the currecny_cde does not appear anymore

[olivermrbl]

Couple of initial comments. Haven't gotten to the variant service changes yet :)

[olivermrbl]

LGTM - this is a great piece of work @adrien2p!

nitpicking: Should we create types for some of these service method payloads? Think it is slightly messy with inline typings

[olivermrbl]

@riqwan Will you give this a final review too? 🙏

[olivermrbl]

@adrien2p Please add a changeset :)

[riqwan]

This must've been a real test, looks great! 🎉

[adrien2p]

LGTM - this is a great piece of work @adrien2p!

nitpicking: Should we create types for some of these service method payloads? Think it is slightly messy with inline typings

I ve includes the types @olivermrbl