for {i++}

 编译gperftools，make install 然后设置so的位置 export LD_PRELOAD=/usr/local/lib64/libprofiler.so  最后执行 env CPUPROFILE=test-normal.prof ./testcpp 就有test-normal.prof结果了 剩下的就是 pprof --text testcpp ./test-normal.prof  或者 pprof --dot testcpp ./test-normal.prof  > test.dot 等等

下载bitcoin core 安装打开，开始同步，不等同步完，隐藏，创建钱包，关闭bitcoin core 将备份的钱包wallet.bat替换 打开bitcoin core，等待同步完成 最后就能看到所以的余额

  Repartition Bad Drive   http://www.dposoft.net/rbd.html

 假设如下代码 uint8 a = 1 print(a << 8) 对于golang来说，溢出了，输出是0 而对于c++来说，输出是256

adb shell settings put global captive_portal_server g.cn

 打算把luaH_get跳转到自己的luaH_get，结果发现有一个luaO_nilobject的东西会导致在原来的so和新的so里都存在，于是内部就错乱了，有很多判断luaO_nilobject的地方

 https://twrp.me/google/googlepixel2.html Download Links: Current and past versions of TWRP can be found at one of the mirrors below: Primary (Americas) Primary (Europe) Installation: If you already have TWRP installed: Download the latest zip and install the zip using TWRP. If you do not already have TWRP installed: Download both the img and the zip. You will need to have fastboot binaries and the correct drivers installed. Power off your device completely. Hold volume down and turn on the device. Your device should now be in the bootloader. Connect the device to your PC. Open a command window and run the following command from the proper location: fastboot boot path/to/twrp.img This will temporarily boot TWRP on your device. Use adb to push the zip onto your device: adb push path/to/twrp.zip / Go to install and browse to the zip and install the zip. The zip will install TWRP to both boot slots. Installing TWRP at this t...