看到「Wez's Terminal」，又一個用 GPU 加速的 terminal 專案，跑去翻一下 Hacker News 上的討論，意外的翻到有趣的東西：「Wezterm – A GPU-accelerated cross-platform terminal emulator and multiplexer (github.com/wez)」。

目前最前面的討論是這個：

I just saw this and after a quick checkout of the latest release (which is what I can quickly install), I feel a bit disappointed. Here is yet another GPU-accelerated terminal that claims to be a VT500 (judging by its Device Attributes report), sets TERM to xterm-256color, while having holes in basic VT100 support (just ran VTTEST in it and saw glaring issues, need not look further than basic VT100 tests, TAB setting/resetting, cursor save/restore).

比較有趣的是裡面提到了 vttest 這套測試軟體可以測 terminal 的標準相容性，在 vttest 的官網上有提到可以測 VT100、VT220 與 VT520：

Vttest tests the compatibility (demonstrates the non-compatibility) of so-called “VT100-compatible” terminals. In conformance of the good old hacker traditions, the only documentation of this program is the source code itself. To understand it, you also need a copy of the original VT100 manual from DEC.

Additional tests (past version 1.7) are provided for analysis of vt220 through vt520 terminals, as well as variants of xterm.

另外比較驚訝的是，terminal 下可以作到這樣的效果 (這邊看官方的截圖應該是 VT420？)：

回到原來講標準相容性的問題，對於泡在 terminal 下的人來說超級重要，有工具可以測試幫助不少... vttest 這套程式在 Ubuntu 內可以直接裝來用：「Ubuntu – Package Search Results -- vttest」。