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Avoid database lookups for `DescriptionHTML` (#18924) 

* Avoid database lookups for `DescriptionHTML`

- Don't Compose meta's for DescriptionHTML, they are only needed in
order to correctly format and show issue's but it's highly unlikely that
a repository description will refer to a local issue.

Using 125 Connections for 5 seconds: on `/explore/repos`(which is the most
noticeable usage by this function's database lookups):

Before:

Statistics        Avg      Stdev        Max
  Reqs/sec       569.41     506.05    2715.00
  Latency      214.27ms    16.60ms   294.84ms
  HTTP codes:
    1xx - 0, 2xx - 2974, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:    27.17MB/s

After:

Statistics        Avg      Stdev        Max
  Reqs/sec      1585.04     789.84    4144.56
  Latency       78.89ms    15.89ms   206.94ms
  HTTP codes:
    1xx - 0, 2xx - 7975, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:    73.85MB/s

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: zeripath <art27@cantab.net>
This commit is contained in:
Gusted 2022-02-27 17:51:34 +00:00 committed by GitHub
parent 79c7219be8
commit 548adb94b4
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 1 additions and 1 deletions
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2
models/repo/repo.go
View File

@ -520,7 +520,7 @@ func (repo *Repository) DescriptionHTML(ctx context.Context) template.HTML {
desc, err := markup.RenderDescriptionHTML(&markup.RenderContext{ desc, err := markup.RenderDescriptionHTML(&markup.RenderContext{
Ctx: ctx, Ctx: ctx,
URLPrefix: repo.HTMLURL(), URLPrefix: repo.HTMLURL(),
Metas: repo.ComposeMetas(), // Don't use Metas to speedup requests
}, repo.Description) }, repo.Description)
if err != nil { if err != nil {
log.Error("Failed to render description for %s (ID: %d): %v", repo.Name, repo.ID, err) log.Error("Failed to render description for %s (ID: %d): %v", repo.Name, repo.ID, err)