Add perf tracing for Salsa

Author: davidanthoff

src/languageserverinstance.jl

@@ -78,8 +78,29 @@ mutable struct LanguageServerInstance
     _extra_tracked_files::Vector{URI}
 
     function LanguageServerInstance(@nospecialize(pipe_in), @nospecialize(pipe_out), env_path="", depot_path="", err_handler=nothing, symserver_store_path=nothing, download=true, symbolcache_upstream = nothing, julia_exe::Union{NamedTuple{(:path,:version),Tuple{String,VersionNumber}},Nothing}=nothing)
+        endpoint = JSONRPC.JSONRPCEndpoint(pipe_in, pipe_out, err_handler)
+        jw = JuliaWorkspace()
+        if hasfield(typeof(jw.runtime), :performance_tracing_callback)
+            jw.runtime.performance_tracing_callback = (name, start_time, duration) -> begin
+                if g_operationId[] != ""
+                    JSONRPC.send(
+                        endpoint,
+                        telemetry_event_notification_type,
+                        Dict(
+                            "command" => "request_metric",
+                            "operationId" => string(uuid4()),
+                            "operationParentId" => g_operationId[],
+                            "name" => name,
+                            "duration" => duration,
+                            "time" => string(Dates.unix2datetime(start_time), "Z")
+                        )
+                    )
+                end
+            end
+        end
+
         new(
-            JSONRPC.JSONRPCEndpoint(pipe_in, pipe_out, err_handler),
+            endpoint,
             Set{String}(),
             Dict{URI,Document}(),
             env_path,
@@ -110,7 +131,7 @@ mutable struct LanguageServerInstance
             missing,
             nothing,
             false,
-            JuliaWorkspace(),
+            jw,
             Dict{URI,Int}(),
             Dict{URI,JuliaWorkspaces.TextFile}(),
             URI[]