Use v8 snapshots to cache dependencies

lib/hyper.d.ts

@@ -7,6 +7,17 @@ declare global {
     rpc: Client;
     focusActiveTerm: (uid?: string) => void;
   }
+
+  const snapshotResult: {
+    customRequire: {
+      (module: string): NodeModule;
+      cache: Record<string, {exports: NodeModule}>;
+      definitions: Record<string, {exports: any}>;
+    };
+    setGlobals(global: any, process: any, window: any, document: any, console: any, require: any): void;
+  };
+
+  const __non_webpack_require__: NodeRequire;
 }
 
 export type ITermGroup = Immutable<{

lib/index.tsx

@@ -1,3 +1,4 @@
+import './v8-snapshot-util';
 import {webFrame} from 'electron';
 import forceUpdate from 'react-deep-force-update';
 import {Provider} from 'react-redux';

lib/v8-snapshot-util.ts

@@ -0,0 +1,21 @@
+if (typeof snapshotResult !== 'undefined') {
+  const Module = __non_webpack_require__('module');
+  const originalLoad: (module: string, ...args: any[]) => any = Module._load;
+
+  Module._load = function _load(module: string, ...args: any[]): NodeModule {
+    let cachedModule = snapshotResult.customRequire.cache[module];
+
+    if (cachedModule) return cachedModule.exports;
+
+    if (snapshotResult.customRequire.definitions[module]) {
+      cachedModule = {exports: snapshotResult.customRequire(module)};
+    } else {
+      cachedModule = {exports: originalLoad(module, ...args)};
+    }
+
+    snapshotResult.customRequire.cache[module] = cachedModule;
+    return cachedModule.exports;
+  };
+
+  snapshotResult.setGlobals(global, process, window, document, console, global.require);
+}