内存管理器依赖作为相邻内存slab的堆，因此当堆需要扩展时无法分配更多本机内存；所有堆内存必须预先保留。

The memory manager relies on the heap being a contiguous slab of memory, so it's impossible to allocate more native memory when the heap needs to expand; all heap memory must be reserved up front.

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我们知道，一个Windows外壳扩展即是一个进程内的COM服务器，它在Windows资源管理器执行某种动作时装入内存——如显示上下文菜单。

As you know, a Windows shell extension is a COM in-process server that Windows Explorer loads when it is about to perform a certain action on a document-for example, displaying its context menu.

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内存用量通常在 100 MB 左右，当我运行着 Firefox（带有几个扩展）、VLC、Skype、Parcellite（译者注：一款轻量级 Gtk+ 剪贴板管理器）、网络管理器（network manager），和 EEE-control 时的峰值也只不过 175 MB 左右。

Memory usage is typically around 100 MB, and climbs to about 175 MB when I have Firefox (with several extensions), VLC, Skype, Parcellite, network manager, and EEE-control running.

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