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perf: reduce number of queries made by /api/v2/workspaceagents/{id} (#21522)

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Relates to https://github.com/coder/internal/issues/1214

The `ExtractWorkspaceAgentParam` middleware ends up making 4 database
queries to follow the chain of `WorkspaceAgent` -> `WorkspaceResource`
-> `ProvisionerJob` -> `WorkspaceBuild` -- but then dropping all that
hard work on the floor. The `api.workspaceAgent` handler that references
this middleware then has to do all of that work again, plus one more
query to get the related `User` so we can get the username. This pattern
is also mirrored in `getDatabaseTerminal` but without the middleware.

This PR:
* Adds a new query `GetWorkspaceAgentAndWorkspaceByID` to fetch all
this information at once to avoid the multiple round-trips,
* Updates the existing usage of `GetWorkspaceAgentByID` to this new
query instead,
* Updates `ExtractWorkspaceAgentParam` to also store the workspace in
the request context

Dalibo: [0.63ms](https://explain.dalibo.com/plan/40bb597f3539gc6c)
This commit is contained in:
Cian Johnston
2026-01-19 12:36:33 +00:00
committed by GitHub
parent d176714f90
commit 08343a7a9f
17 changed files with 259 additions and 230 deletions
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coderd/workspacebuilds.go
+1 -1
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@@ -1252,7 +1252,7 @@ func (api *API) convertWorkspaceBuild(
statuses := statusesByAgentID[agent.ID]
logSources := logSourcesByAgentID[agent.ID]
apiAgent, err := db2sdk.WorkspaceAgent(
api.DERPMap(), *api.TailnetCoordinator.Load(), agent, db2sdk.Apps(apps, statuses, agent, workspace.OwnerUsername, workspace), convertScripts(scripts), convertLogSources(logSources), api.AgentInactiveDisconnectTimeout,
api.DERPMap(), *api.TailnetCoordinator.Load(), agent, db2sdk.Apps(apps, statuses, agent, workspace.OwnerUsername, workspace.WorkspaceTable()), convertScripts(scripts), convertLogSources(logSources), api.AgentInactiveDisconnectTimeout,
api.DeploymentValues.AgentFallbackTroubleshootingURL.String(),
)
if err != nil {