diff --git a/autoload/denops.vim b/autoload/denops.vim
index 160bfcd5..280aedc5 100644
--- a/autoload/denops.vim
+++ b/autoload/denops.vim
@@ -20,6 +20,7 @@ endfunction
 call denops#_internal#conf#define('denops#disabled', 0)
 call denops#_internal#conf#define('denops#deno', 'deno')
 call denops#_internal#conf#define('denops#debug', 0)
+call denops#_internal#conf#define('denops#plugin_architecture_model', 'worker')
 call denops#_internal#conf#define('denops#disable_deprecation_warning_message', 0)
 
 " Internal configuration
diff --git a/denops/@denops-private/host/invoker.ts b/denops/@denops-private/host/invoker.ts
index 505c26d3..329d8b19 100644
--- a/denops/@denops-private/host/invoker.ts
+++ b/denops/@denops-private/host/invoker.ts
@@ -8,7 +8,7 @@ export class Invoker {
     this.#service = service;
   }
 
-  register(name: string, script: string): void {
+  register(name: string, script: string): Promise<void> {
     return this.#service.register(name, script);
   }
 
diff --git a/denops/@denops-private/service.ts b/denops/@denops-private/service.ts
index d4adb9d7..67b23eb7 100644
--- a/denops/@denops-private/service.ts
+++ b/denops/@denops-private/service.ts
@@ -1,3 +1,4 @@
+import { ensure, is } from "https://deno.land/x/unknownutil@v3.10.0/mod.ts";
 import { toFileUrl } from "https://deno.land/std@0.208.0/path/mod.ts";
 import type { Disposable } from "https://deno.land/x/disposable@v1.2.0/mod.ts";
 import type { Host } from "./host/base.ts";
@@ -5,12 +6,14 @@ import { Invoker } from "./host/invoker.ts";
 import type { Meta } from "../@denops/mod.ts";
 import type { Plugin } from "./plugin/base.ts";
 import { WorkerPlugin } from "./plugin/worker/plugin.ts";
+import { NaivePlugin } from "./plugin/naive/plugin.ts";
 
 /**
  * Service manage plugins and is visible from the host (Vim/Neovim) through `invoke()` function.
  */
 export class Service implements Disposable {
   #plugins: Map<string, Plugin>;
+  #model: Promise<"worker" | "naive">;
   readonly host: Host;
   readonly meta: Meta;
 
@@ -19,12 +22,15 @@ export class Service implements Disposable {
     this.host = host;
     this.host.register(new Invoker(this));
     this.meta = meta;
+    this.#model = this.host.call("eval", "g:denops#plugin_architecture_model")
+      .then((m) => ensure(m, is.LiteralOneOf(["worker", "naive"] as const)));
   }
 
-  register(
+  async register(
     name: string,
     script: string,
-  ): void {
+  ): Promise<void> {
+    const model = await this.#model;
     const plugin = this.#plugins.get(name);
     if (plugin) {
       if (this.meta.mode === "debug") {
@@ -32,9 +38,15 @@ export class Service implements Disposable {
       }
       return;
     }
+    const PluginCls = model === "worker" ? WorkerPlugin : NaivePlugin;
+    if (this.meta.mode === "debug") {
+      console.log(
+        `Register a denops plugin '${name}' with '${PluginCls.name}' model`,
+      );
+    }
     this.#plugins.set(
       name,
-      new WorkerPlugin(name, resolveScriptUrl(script), this),
+      new PluginCls(name, resolveScriptUrl(script), this),
     );
   }
 
diff --git a/doc/denops.txt b/doc/denops.txt
index fc100906..31948f08 100644
--- a/doc/denops.txt
+++ b/doc/denops.txt
@@ -88,6 +88,19 @@ VARIABLE						*denops-variable*
 
 	Default: 0
 
+*g:denops#plugin_architecture_model*
+	The name of internal plugin architecture model. One of the followings
+	are available.
+
+	"worker"	Isolate each plugins in each worker process. This is
+			the default model.
+
+	"naive"		Directly import each plugins in the main process. This
+			may improve performance of plugin loading. It is an
+			experimental feature and may cause unexpected errors.
+
+	Default: "worker"
+
 *g:denops#disable_deprecation_warning_message*
 	Set 1 to disable deprecation warning messages.