hj/pleroma
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Revert "Parallelize template rendering"

Browse source 
This reverts commit 1ad71592ad.

Since it had no limit on the number on concurrent processes it OOM killed
instances while rendering hellthreads. When I tried introducing a
concurrency limit with Task.async_stream/manual folds it lead to about 3 times
worse performance on threads larger than 1000 activities (we are talking
30s vs 1.2 minutes), I think this is not worth the about 1.5 times
performance increase on smaller threads when using it.
This commit is contained in:
rinpatch 2019-09-10 22:01:45 +03:00
commit 43f02dfe38
3 changed files with 12 additions and 48 deletions
Download patch file Download diff file Expand all files Collapse all files

18
lib/pleroma/web/web.ex
View file

@ -66,23 +66,9 @@ defmodule Pleroma.Web do
end
@doc """
Same as `render_many/4` but wrapped in rescue block and parallelized (unless disabled by passing false as a fifth argument).
Same as `render_many/4` but wrapped in rescue block.
"""
def safe_render_many(collection, view, template, assigns \\ %{}, parallel \\ true)
def safe_render_many(collection, view, template, assigns, true) do
Enum.map(collection, fn resource ->
Task.async(fn ->
as = Map.get(assigns, :as) || view.__resource__
assigns = Map.put(assigns, as, resource)
safe_render(view, template, assigns)
end)
end)
|> Enum.map(&Task.await(&1, :infinity))
|> Enum.filter(& &1)
end
def safe_render_many(collection, view, template, assigns, false) do
def safe_render_many(collection, view, template, assigns \\ %{}) do
Enum.map(collection, fn resource ->
as = Map.get(assigns, :as) || view.__resource__
assigns = Map.put(assigns, as, resource)