Clojurians Log v2
pathom
hello people, I just fixed the embed visualizations in the planner docs of Pathom 3, in case you checked recently and found it broken, its fixed and up now 🙂 https://pathom3.wsscode.com/docs/planner. Also, these are more recent visualizations strait from a new thing that I’m calling Pathom Viz Embed, this is something you can use to embed Pathom Viz in web renderes, currently I’m using on the site and now in the Pathom 3 docs. Docs for the viz embed are not available now, but you can find full examples in the sources for Pathom 3 docs: https://github.com/wilkerlucio/pathom3-docs/blob/master/src/main/com/wsscode/pathom3/docs/components.cljs
For anybody playing with Pathom 3 and batches, I just pushed some fixes at version fe29d9d3ec89a0321bf20b41a4f2d161f715b80d, if you had trouble, please try this version
Great @wilkerlucio, will check it out
thanks @henrik! Just out of curiosity (and in case you tested 🙂, if you do your batch attempt, does it get faster or slower than non-batching?
It definitely seems slower I'm afraid. This probably comes down to the fact that when the resolver isn't batched, it is called 70 times for a particular query (each call resolves in about 0.4ms, ~28ms out of a total of 0.1s for the entire Pathom run). When batched, however, the resolver is called with 525 entries, making the overall Pathom query balloon to about 0.3s.
This is just a quick comparison, I can throw Criterium at it to get more reliable numbers if it'll help.
So,
{'(count inputs) 525
'(count (distinct inputs)) 70}inputs is the arguments that the batched resolver is called with.gotcha, yeah, for fast resolvers like this is expected that batch isn’t going to be faster
batch will shine better in case of hard IO that can be batched (looking up some external entity, avoiding n+1)
but I dont get why you have so many more calls in batch mode, it could be related to the deoptimized graph, but still, if things are not failing, it should be the same number of calls
from the 525 entries, some of those share the same inputs? thats how it reduces to 70?
@henrik I just made a change that will deduplicate same inputs on batch, can you please try again on ca9ea82ef92f8113148b39b884639b2a9e25a29a?
Cool! Will do.
> from the 525 entries, some of those share the same inputs? thats how it reduces to 70? Exactly. I'm pulling a highly interconnected graph, so there's a lot of redundancy. Let's say I'm asking for entities A, B, and C. If they're all connected to entity D, it ends up that I get D three times. When not using batching, it seems that Pathom is really good at deduplicating this, so that it only asked for D once. When using batching, it seems like each individual time D was required (once for A, B and C, each, a total of 3 times), this was forwarded to the resolver, resulting in a lot of redundancy in the batched collection (in the example, 3 calls to get D instead of 1 call to get D, which is then reused). I'll check out the change and see if this is no longer the case.
@wilkerlucio I'm seeing no duplication when using batching now 👍