It's Just Typing — Why Do I Have to Carry an Entire Ecosystem? A Deep Dive into the "Bloat Logic" of Commercial Input Methods

Today, something absurd happened on my maxed-out M3 Max: typing lagged.

I opened Activity Monitor, and there it was — BaiduIM, gorging on 268MB of memory, CPU activity spiking like it was running some heavy computation. As a developer, my first instinct wasn't to curse at it. I was curious: what exactly is a tool that converts KeyCodes into Chinese characters doing in the background?

1. The "Original Sin" of Architecture: Efficiency vs. Performance

I took a look at the libraries it had loaded. The most glaring one: FlutterMacOS.framework.

Modern commercial input methods are nothing like the lightweight system plugins they used to be. In order to get the same polished skins and complex interactions running identically across Win/Mac/Android, vendors have turned to cross-platform UI frameworks like Flutter.

• The technical cost: It's like bringing an industrial generator just to drive a screw. To render a few candidate word windows, the system has to run an entire graphics rendering pipeline in the background.
• The business calculus: From the company's perspective, this is a steal. One codebase covers all platforms, UI development velocity goes through the roof. But the cost gets quietly offloaded onto your RAM.

2. Product Logic: When an Input Method Wants to Become the Center of the Universe

Why can't commercial input methods stop growing? Because they've taken on way too many jobs that have nothing to do with typing.

BaiduIM loads screen_retriever (screen capture) and window_manager (window management). This is the current mainstream smart assistant logic at work: it needs to know which app you're in and what you're looking at, so it can push "smart emoji suggestions," "screenshot OCR," or "search recommendations."

This "necessity" is really a matter of perspective:

• For everyday users: As long as they get pretty themes and the latest memes, they don't care about the extra memory — they might even think it's great.
• For power users and professionals: This behavior — permanently resident in the background, ready to read your screen at any moment, logging furiously (see: BILog.mmap3) — is a dual disaster for both performance and privacy.

3. Does This Resource Grab Even Make Sense?

For the vendors, absolutely. In the era of saturated internet growth, an input method is one of the very few apps that can stay resident 24/7 and cover every scenario. To hold that entry point, piling on features and inflating activity metrics is the only rational business move.

But for those of us who treat our Macs as serious productivity machines, this is a textbook case of the tragedy of the commons.

Every foundational piece of software thinks it's fine to hog 200MB of memory. The end result: your M3 Max, the moment you spin up a few Docker containers or a video project, gets forced into memory compression (Compressor) and eventually Swap. Our top-tier computing power shouldn't be wasted feeding the bloated, irrelevant "fat logic" of tools that have wandered far from their core job of typing.

4. Switching: A Rational Return

I eventually uninstalled every commercial input method on my system and switched to Rime (Squirrel) with the Rime Ice dictionary.

This isn't to say Rime is smarter than Baidu — honestly, it's kind of "dumb." No GUI, changing a config means digging through YAML source files. But that "dumbness" buys you radical restraint:

• Memory usage holds steady at around 100MB.
• CPU activity is < 1% basically always.
• Zero permission requests — it doesn't need to see my screen or manage my windows.

Closing Thoughts

Not every piece of software needs to become a "platform." Sometimes, a tool that quietly sits in a corner of your system — ready in an instant when you need it, completely invisible when you don't — is the highest form of respect for both top-tier hardware and the people using it.