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Repeat character (REP)
REP repeats the preceding graphic character N times. The sequence is
ESC [ N b (default N=1). This is a bandwidth optimization — instead of sending the same character hundreds of times (e.g., filling a row with dashes), the application sends the character once followed by REP. Not all terminals implement this sequence.Supported by 5 of 6 backends (83%)
Support Matrix
| Backend | Version | Support | Notes |
|---|---|---|---|
| Alacritty | 0.26.0 | ✓ yes | |
| Ghostty | 1.3.1 | ✓ yes | |
| Kitty | 0.40.0 | ✓ yes | |
| WezTerm | 0.1.0-fork.5 | ✓ yes | |
| xterm.js | 5.5.0 | ✓ yes | |
| vt100 | 0.1.0 | ✗ no | REP not implemented — pure TypeScript emulator |