When I first played around compiling the linux kernel, I found that most of it is like a suburban garage, with a kayak and a brake bleeder and a hoe and golf clubs.<p>Except the kernel puts the suburban garage to shame.<p>My kernel config shows:<p><pre><code> CONFIG_HAMRADIO=y
CONFIG_BAYCOM_SER_FDX=m (from AX.25 network device drivers)
CONFIG_CAN_SJA1000=m (from CAN device drivers)
CONFIG_NFC_MRVL=m (from Near Field Communication (NFC) devices)
</code></pre>
after a while I just scroll faster and faster zooming past:<p><pre><code> CONFIG_VMWARE_BALLOON=m
CONFIG_HABANA_AI=m
CONFIG_MACINTOSH_DRIVERS=y
CONFIG_HAPPYMEAL=m
</code></pre>
...and loadable module support for 4 heart rate monitors, 18 inertial measurement units and 18 magnetometer sensors. Even 2 VME bridge drivers.<p>There are 11,018 lines of this.<p>So when he talked about compile time optimization, this is what I thought of.