WezTerm

Tested Software version 20240203-110809-5046fc22 on Linux. The homepage URL of this terminal is https://wezfurlong.org/wezterm/. Full results available at ucs-detect repository path data/wezterm.yaml.

Score Breakdown

Detailed breakdown of how scores are calculated for WezTerm:

#

Score Type

Raw Score

Final Scaled Score

1

WIDE

54.94%

36.3%

2

NARROW

92.51%

92.5%

3

ZWJ

100.00%

100.0%

4

LANG

86.83%

86.8%

5

VS16

50.00%

50.0%

6

VS15

0.00%

(excluded)

7

SRI

0.00%

0.0%

8

SFZ

100.00%

100.0%

9

RI

100.00%

100.0%

10

FEAT

62.50%

66.7%

11

Graphics

100%

100.0%

12

Resources

27.5%

27.5%

Score Comparison Plot:

The following plot shows how this terminal’s scores compare to all other terminals tested.

../_images/wezterm_scores_scaled.png

Scaled scores comparison across all metrics (normalized 0-100%)

Final Scaled Score Calculation:

  • Raw Final Score: 66.61% (weighted average: WIDE + NARROW + ZWJ + LANG + VS16 + 0.33 * SRI + 0.33 * SFZ + RI + CAP + 0.5 * GFX + 0.5 * RSC) the categorized ‘average’ absolute support level of this terminal.

    Note

    RSC (Resources) is a composite CPU, memory, and runtime score. RSC is weighted at 0.5 (half as powerful as other metrics). FEAT (Features) is the fraction of notable features supported. GFX (Graphics) scores 100% for modern protocols (iTerm2, Kitty), 50% for legacy only (Sixel, ReGIS), 0% for none.

  • Final Scaled Score: 53.5% (normalized across all terminals tested). Final Scaled scores are normalized (0-100%) relative to all terminals tested

WIDE Score Details:

Wide character support calculation:

  • Total successful codepoints: 278

  • Total codepoints tested: 506

  • Formula: 278 / 506

  • Result: 54.94%

NARROW Score Details:

Narrow character support calculation:

  • Total successful codepoints: 173

  • Total codepoints tested: 187

  • Formula: 173 / 187

  • Result: 92.51%

ZWJ Score Details:

Emoji ZWJ (Zero-Width Joiner) support calculation:

  • Total successful sequences: 1445

  • Total sequences tested: 1445

  • Formula: 1445 / 1445

  • Result: 100.00%

VS16 Score Details:

Variation Selector-16 support calculation:

  • Errors: 213 of 426 codepoints tested

  • Success rate: 50.0%

  • Formula: 50.0 / 100

  • Result: 50.00%

VS15 Score Details (excluded from final score):

Variation Selector-15 support calculation:

  • Errors: 158 of 158 codepoints tested

  • Success rate: 0.0%

  • Formula: 0.0 / 100

  • Result: 0.00%

SRI Score Details:

Standalone Regional Indicator support calculation:

  • Total successful codepoints: 0

  • Total codepoints tested: 26

  • Formula: 0 / 26

  • Result: 0.00%

SFZ Score Details:

Standalone Fitzpatrick skin tone modifier support calculation:

  • Total successful codepoints: 5

  • Total codepoints tested: 5

  • Formula: 5 / 5

  • Result: 100.00%

RI Score Details:

Regional Indicator flag sequence support calculation:

  • Total successful sequences: 262

  • Total sequences tested: 262

  • Formula: 262 / 262

  • Result: 100.00%

Features Score Details:

Notable terminal features (10.0 / 16):

Raw score: 62.50%

Graphics Score Details:

Graphics protocol support (100%):

  • Sixel: yes

  • ReGIS: no

  • iTerm2: no

  • Kitty: yes

Scoring: 100% for modern (iTerm2/Kitty), 50% for legacy only (Sixel/ReGIS), 0% for none

Resource Score Details:

  • Duration: 92.2s

  • Mean CPU: 97.6%

  • Mean RSS: 178.5 MB

  • Resources Score: 27/100

  • Note: log-scale composite cost = log(CPU+1) + log(RSS+1) + log(time+1)

  • Scaled result: 27.5%

LANG Score Details (Geometric Mean):

Geometric mean calculation:

  • Formula: (p₁ × p₂ × … × pₙ)^(1/n) where n = 85 languages

  • About geometric mean

  • Result: 86.83%

Wide character support

Wide character support of WezTerm is 54.9% (228 errors of 506 codepoints tested).

Sequence of a WIDE character, from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0001D31D

‘\U0001d31d’

So

2

TETRAGRAM FOR JOY

Total codepoints: 1

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xf0\x9d\x8c\x9d|\\n12|\\n"
𝌝|
12|

  • See Line 42264 of ucs_wide.txt for this sequence in the example file.

Screenshot:

Terminal screenshot of the rendering discrepancy

Narrow character support

Narrow character support of WezTerm is 92.5% (14 errors of 187 codepoints tested).

Sequence of a NARROW character, from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+06DD

‘\u06dd’

Cf

1

ARABIC END OF AYAH

Total codepoints: 1

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xdb\x9d|\\n1|\\n"
۝|
1|

  • python wcwidth.wcswidth() measures width 1, while WezTerm measures width 0.

Emoji ZWJ support

Compatibility of WezTerm with the Unicode Emoji ZWJ sequence table is 100.0% (0 errors of 1445 sequences tested).

Variation Selector-16 support

Emoji VS-16 results for WezTerm is 213 errors out of 426 total codepoints tested, 50.0% success. Sequence of a NARROW Emoji made WIDE by Variation Selector-16, from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+2733

‘\u2733’

So

1

EIGHT SPOKED ASTERISK

2

U+FE0F

‘\ufe0f’

Mn

0

VARIATION SELECTOR-16

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe2\x9c\xb3\xef\xb8\x8f|\\n12|\\n"
✳️|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Variation Selector-15 support

Emoji VS-15 results for WezTerm is 158 errors out of 158 total codepoints tested, 0.0% success. Sequence of a WIDE Emoji made NARROW by Variation Selector-15, from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0001F3AE

‘\U0001f3ae’

So

2

VIDEO GAME

2

U+FE0E

‘\ufe0e’

Mn

0

VARIATION SELECTOR-15

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xf0\x9f\x8e\xae\xef\xb8\x8e|\\n1|\\n"
🎮︎|
1|

Screenshot:

Terminal screenshot of the rendering discrepancy

Standalone Regional Indicator support

Standalone Regional Indicator support of WezTerm is 0.0% (26 errors of 26 codepoints tested).

Sequence of a standalone Regional Indicator, from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0001F1F3

‘\U0001f1f3’

So

2

REGIONAL INDICATOR SYMBOL LETTER N

Total codepoints: 1

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xf0\x9f\x87\xb3|\\n12|\\n"
🇳|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Standalone Fitzpatrick modifier support

Standalone Fitzpatrick skin tone modifier support of WezTerm is 100.0% (0 errors of 5 codepoints tested).

Regional Indicator flag sequence support

Regional Indicator flag sequence support of WezTerm is 100.0% (0 errors of 262 sequences tested).

Graphics Protocol Support

WezTerm supports the following graphics protocols: Sixel, Kitty graphics.

Detection Methods:

  • Sixel and ReGIS: Detected via the Device Attributes (DA1) query CSI c (\x1b[c). Extension code 4 indicates Sixel support, 3 ReGIS.

  • Kitty graphics: Detected by sending a Kitty graphics query and checking for an OK response.

  • iTerm2 inline images: Detected via the iTerm2 capabilities query OSC 1337 ; Capabilities.

Device Attributes Response:

  • Extensions reported: 4, 6, 18, 22

  • Sixel indicator (4): present

  • ReGIS indicator (3): not present

Language Support

The following 61 languages were tested with 100% success:

Aja, Amarakaeri, Arabic, Standard, Assyrian Neo-Aramaic, Baatonum, Bamun, Belanda Viri, Bora, Catalan (2), Chickasaw, Chinantec, Chiltepec, Dagaare, Southern, Dari, Dendi, Dinka, Northeastern, Dzongkha, Evenki, Farsi, Western, Fon, French (Welche), Fur, Ga, Gen, Gilyak, Gumuz, Kabyle, Lamnso’, Lao, Lingala (tones), Maldivian, Maori (2), Mazahua Central, Mòoré, Nanai, Navajo, Orok, Otomi, Mezquital, Panjabi, Western, Pashto, Northern, Picard, Pular (Adlam), Secoya, Seraiki, Shipibo-Conibo, Siona, South Azerbaijani, Tagalog (Tagalog), Tai Dam, Tamang, Eastern, Tamazight, Central Atlas, Tem, Thai, Thai (2), Tibetan, Central, Ticuna, Uduk, Urdu (2), Vietnamese, Yaneshaʼ, Yiddish, Eastern, Yoruba.

The following 24 languages are not fully supported:

lang

n_errors

n_total

pct_success

Sanskrit (Grantha)

197

237

16.9%

Tamil

106

132

19.7%

Kannada

157

236

33.5%

Sinhala

101

198

49.0%

Panjabi, Eastern

103

236

56.4%

Bengali

145

335

56.7%

Bhojpuri

108

252

57.1%

Malayalam

162

382

57.6%

Gujarati

120

290

58.6%

Magahi

8

22

63.6%

Burmese

76

223

65.9%

Khmer, Central

116

390

70.3%

Sanskrit

44

155

71.6%

Marathi

29

103

71.8%

Hindi

45

164

72.6%

Khün

93

354

73.7%

Telugu

86

335

74.3%

Maithili

15

66

77.3%

Mon

45

208

78.4%

Javanese (Javanese)

86

488

82.4%

Nepali

12

71

83.1%

Chakma

34

225

84.9%

Shan

11

106

89.6%

Urdu

1

23

95.7%

Sanskrit (Grantha)

Sequence of language Sanskrit (Grantha) from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+00011305

‘\U00011305’

Lo

1

GRANTHA LETTER A

2

U+00011302

‘\U00011302’

Mc

0

GRANTHA SIGN ANUSVARA

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xf0\x91\x8c\x85\xf0\x91\x8c\x82|\\n12|\\n"
𑌅𑌂|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Tamil

Sequence of language Tamil from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0B95

‘\u0b95’

Lo

1

TAMIL LETTER KA

2

U+0BBE

‘\u0bbe’

Mc

0

TAMIL VOWEL SIGN AA

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xae\x95\xe0\xae\xbe|\\n12|\\n"
கா|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Kannada

Sequence of language Kannada from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0C85

‘\u0c85’

Lo

1

KANNADA LETTER A

2

U+0C82

‘\u0c82’

Mc

0

KANNADA SIGN ANUSVARA

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xb2\x85\xe0\xb2\x82|\\n12|\\n"
ಅಂ|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Sinhala

Sequence of language Sinhala from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0D9A

‘\u0d9a’

Lo

1

SINHALA LETTER ALPAPRAANA KAYANNA

2

U+0DCF

‘\u0dcf’

Mc

0

SINHALA VOWEL SIGN AELA-PILLA

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xb6\x9a\xe0\xb7\x8f|\\n12|\\n"
කා|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Panjabi, Eastern

Sequence of language Panjabi, Eastern from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0A15

‘\u0a15’

Lo

1

GURMUKHI LETTER KA

2

U+0A3E

‘\u0a3e’

Mc

0

GURMUKHI VOWEL SIGN AA

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xa8\x95\xe0\xa8\xbe|\\n12|\\n"
ਕਾ|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Bengali

Sequence of language Bengali from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0985

‘\u0985’

Lo

1

BENGALI LETTER A

2

U+0982

‘\u0982’

Mc

0

BENGALI SIGN ANUSVARA

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xa6\x85\xe0\xa6\x82|\\n12|\\n"
অং|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Bhojpuri

Sequence of language Bhojpuri from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0915

‘\u0915’

Lo

1

DEVANAGARI LETTER KA

2

U+093E

‘\u093e’

Mc

0

DEVANAGARI VOWEL SIGN AA

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xa4\x95\xe0\xa4\xbe|\\n12|\\n"
का|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Malayalam

Sequence of language Malayalam from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0D05

‘\u0d05’

Lo

1

MALAYALAM LETTER A

2

U+0D02

‘\u0d02’

Mc

0

MALAYALAM SIGN ANUSVARA

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xb4\x85\xe0\xb4\x82|\\n12|\\n"
അം|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Gujarati

Sequence of language Gujarati from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0A95

‘\u0a95’

Lo

1

GUJARATI LETTER KA

2

U+0A83

‘\u0a83’

Mc

0

GUJARATI SIGN VISARGA

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xaa\x95\xe0\xaa\x83|\\n12|\\n"
કઃ|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Magahi

Sequence of language Magahi from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0915

‘\u0915’

Lo

1

DEVANAGARI LETTER KA

2

U+094D

‘\u094d’

Mn

0

DEVANAGARI SIGN VIRAMA

3

U+0937

‘\u0937’

Lo

1

DEVANAGARI LETTER SSA

4

U+094D

‘\u094d’

Mn

0

DEVANAGARI SIGN VIRAMA

5

U+0923

‘\u0923’

Lo

1

DEVANAGARI LETTER NNA

Total codepoints: 5

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xa4\x95\xe0\xa5\x8d\xe0\xa4\xb7\xe0\xa5\x8d\xe0\xa4\xa3|\\n12|\\n"
क्ष्ण|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Burmese

Sequence of language Burmese from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+1000

‘\u1000’

Lo

1

MYANMAR LETTER KA

2

U+1031

‘\u1031’

Mc

0

MYANMAR VOWEL SIGN E

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe1\x80\x80\xe1\x80\xb1|\\n12|\\n"
ကေ|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Khmer, Central

Sequence of language Khmer, Central from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+1780

‘\u1780’

Lo

1

KHMER LETTER KA

2

U+17B6

‘\u17b6’

Mc

0

KHMER VOWEL SIGN AA

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe1\x9e\x80\xe1\x9e\xb6|\\n12|\\n"
កា|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Sanskrit

Sequence of language Sanskrit from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0915

‘\u0915’

Lo

1

DEVANAGARI LETTER KA

2

U+094D

‘\u094d’

Mn

0

DEVANAGARI SIGN VIRAMA

3

U+0924

‘\u0924’

Lo

1

DEVANAGARI LETTER TA

4

U+094D

‘\u094d’

Mn

0

DEVANAGARI SIGN VIRAMA

5

U+092F

‘\u092f’

Lo

1

DEVANAGARI LETTER YA

6

U+094B

‘\u094b’

Mc

0

DEVANAGARI VOWEL SIGN O

7

U+0903

‘\u0903’

Mc

0

DEVANAGARI SIGN VISARGA

Total codepoints: 7

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xa4\x95\xe0\xa5\x8d\xe0\xa4\xa4\xe0\xa5\x8d\xe0\xa4\xaf\xe0\xa5\x8b\xe0\xa4\x83|\\n12|\\n"
क्त्योः|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Marathi

Sequence of language Marathi from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+091A

‘\u091a’

Lo

1

DEVANAGARI LETTER CA

2

U+093E

‘\u093e’

Mc

0

DEVANAGARI VOWEL SIGN AA

3

U+0902

‘\u0902’

Mn

0

DEVANAGARI SIGN ANUSVARA

Total codepoints: 3

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xa4\x9a\xe0\xa4\xbe\xe0\xa4\x82|\\n12|\\n"
चां|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Hindi

Sequence of language Hindi from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0915

‘\u0915’

Lo

1

DEVANAGARI LETTER KA

2

U+093E

‘\u093e’

Mc

0

DEVANAGARI VOWEL SIGN AA

3

U+0902

‘\u0902’

Mn

0

DEVANAGARI SIGN ANUSVARA

Total codepoints: 3

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xa4\x95\xe0\xa4\xbe\xe0\xa4\x82|\\n12|\\n"
कां|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Khün

Sequence of language Khün from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+1A20

‘\u1a20’

Lo

1

TAI THAM LETTER HIGH KA

2

U+1A6E

‘\u1a6e’

Mc

0

TAI THAM VOWEL SIGN E

3

U+1A60

‘\u1a60’

Mn

0

TAI THAM SIGN SAKOT

Total codepoints: 3

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe1\xa8\xa0\xe1\xa9\xae\xe1\xa9\xa0|\\n12|\\n"
ᨠᩮ᩠|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Telugu

Sequence of language Telugu from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0C05

‘\u0c05’

Lo

1

TELUGU LETTER A

2

U+0C02

‘\u0c02’

Mc

0

TELUGU SIGN ANUSVARA

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xb0\x85\xe0\xb0\x82|\\n12|\\n"
అం|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Maithili

Sequence of language Maithili from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0915

‘\u0915’

Lo

1

DEVANAGARI LETTER KA

2

U+093F

‘\u093f’

Mc

0

DEVANAGARI VOWEL SIGN I

3

U+0902

‘\u0902’

Mn

0

DEVANAGARI SIGN ANUSVARA

Total codepoints: 3

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xa4\x95\xe0\xa4\xbf\xe0\xa4\x82|\\n12|\\n"
किं|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Mon

Sequence of language Mon from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+1000

‘\u1000’

Lo

1

MYANMAR LETTER KA

2

U+1031

‘\u1031’

Mc

0

MYANMAR VOWEL SIGN E

3

U+102F

‘\u102f’

Mn

0

MYANMAR VOWEL SIGN U

Total codepoints: 3

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe1\x80\x80\xe1\x80\xb1\xe1\x80\xaf|\\n12|\\n"
ကေု|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Javanese (Javanese)

Sequence of language Javanese (Javanese) from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+A98F

‘\ua98f’

Lo

1

JAVANESE LETTER KA

2

U+A983

‘\ua983’

Mc

0

JAVANESE SIGN WIGNYAN

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xea\xa6\x8f\xea\xa6\x83|\\n12|\\n"
ꦏꦃ|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Nepali

Sequence of language Nepali from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+091A

‘\u091a’

Lo

1

DEVANAGARI LETTER CA

2

U+094B

‘\u094b’

Mc

0

DEVANAGARI VOWEL SIGN O

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe0\xa4\x9a\xe0\xa5\x8b|\\n12|\\n"
चो|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Chakma

Sequence of language Chakma from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+00011103

‘\U00011103’

Lo

1

CHAKMA LETTER AA

2

U+0001112C

‘\U0001112c’

Mc

0

CHAKMA VOWEL SIGN E

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xf0\x91\x84\x83\xf0\x91\x84\xac|\\n12|\\n"
𑄃𑄬|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Shan

Sequence of language Shan from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+1004

‘\u1004’

Lo

1

MYANMAR LETTER NGA

2

U+1084

‘\u1084’

Mc

0

MYANMAR VOWEL SIGN SHAN E

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xe1\x80\x84\xe1\x82\x84|\\n12|\\n"
ငႄ|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

Urdu

Sequence of language Urdu from midpoint of alignment failure records:

#

Codepoint

Python

Category

wcwidth

Name

1

U+0601

‘\u0601’

Cf

1

ARABIC SIGN SANAH

2

U+06F1

‘\u06f1’

Nd

1

EXTENDED ARABIC-INDIC DIGIT ONE

Total codepoints: 2

  • Shell test using printf(1), '|' should align in output:

    $ printf "\xd8\x81\xdb\xb1|\\n12|\\n"
؁۱|
12|

Screenshot:

Terminal screenshot of the rendering discrepancy

DEC Private Modes Support

DEC private modes results for WezTerm: 4 changeable modes of 5 supported out of 8 total modes tested (62.5% support, 50.0% changeable).

Complete list of DEC private modes tested:

Mode

Name

Description

Supported

Changeable

Enabled

1004

FOCUS_IN_OUT_EVENTS

Send FocusIn/FocusOut events

Yes

Yes

No

1006

MOUSE_EXTENDED_SGR

Enable SGR Mouse Mode

Yes

Yes

No

2004

BRACKETED_PASTE

Set bracketed paste mode

Yes

Yes

No

2026

SYNCHRONIZED_OUTPUT

Synchronized Output

Yes

Yes

No

2027

GRAPHEME_CLUSTERING

Grapheme Clustering

Yes

No

Yes

2031

COLOR_PALETTE_UPDATES

Color palette updates

No

No

No

2048

IN_BAND_WINDOW_RESIZE

In-Band Window Resize Notifications

No

No

No

5522

BRACKETED_PASTE_MIME

Bracketed Paste MIME

No

No

No

Summary: 4 changeable, 4 not changeable.

Kitty Keyboard Protocol

WezTerm does not support the Kitty keyboard protocol.

XTGETTCAP (Terminfo Capabilities)

WezTerm supports the XTGETTCAP sequence and reports 136 terminfo capabilities (Full).

#

Capability

Description

Value

1

Cr

Set cursor color

\E]112\a

2

Cs

Reset cursor color

\E]12;%p1%s\a

3

Ms

Clipboard set

\E]52;%p1%s;%p2%s\a

4

RGB

Bits per color channel (8 = 24-bit truecolor)

8/8/8

5

Se

Reset underline style

\E[2 q

6

Setulc

Set underline color

\E[58:2::%p1%{65536}%/%d:%p1%{256}%/%{255}%&%d:%p1%{255}%...

7

Smol

Set overline mode

\E[53m

8

Smulx

Styled underline

\E[4:%p1%dm

9

Ss

Set underline style

\E[%p1%d q

10

Sync

Synchronized output

\E[?2026%?%p1%{1}%-%tl%eh

11

TN

Terminal name

WezTerm

12

Tc

Truecolor (24-bit RGB)

1

13

XM

Enter marks mode (kitty)

\E[?1006;1000%?%p1%{1}%=%th%el%;

14

acsc

Alternate character set

``aaffggiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~

15

am

Auto right margin

1

16

bce

Background color erase

1

17

bel

Bell

\a

18

blink

Enter blink mode

\E[5m

19

bold

Enter bold mode

\E[1m

20

ccc

Can redefine colors

1

21

civis

Hide cursor

\E[?25l

22

clear

Clear screen

\E[H\E[2J

23

cnorm

Normal cursor

\E[?12l\E[?25h

24

colors

Max colors on screen

256

25

cols

Columns

80

26

cr

Carriage return

\r

27

csr

Change scroll region

\E[%i%p1%d;%p2%dr

28

cub

Cursor left n

\E[%p1%dD

29

cub1

Cursor left

\b

30

cud

Cursor down n

\E[%p1%dB

31

cud1

Cursor down

\n

32

cuf

Cursor right n

\E[%p1%dC

33

cuf1

Cursor right

\E[C

34

cup

Cursor address

\E[%i%p1%d;%p2%dH

35

cuu

Cursor up n

\E[%p1%dA

36

cuu1

Cursor up

\E[A

37

cvvis

Very visible cursor

\E[?12;25h

38

dch

Delete n characters

\E[%p1%dP

39

dch1

Delete character

\E[P

40

dim

Enter dim mode

\E[2m

41

dl

Delete n lines

\E[%p1%dM

42

dl1

Delete line

\E[M

43

dsl

Disable status line

\E]2;\E\

44

ech

Erase characters

\E[%p1%dX

45

ed

Clear to end of screen

\E[J

46

el

Clear to end of line

\E[K

47

el1

Clear to start of line

\E[1K

48

flash

Flash screen

\E[?5h$<100/>\E[?5l

49

fsl

From status line

\E\

50

home

Cursor home

\E[H

51

hpa

Horizontal position

\E[%i%p1%dG

52

hs

Has status line

1

53

ht

Horizontal tab

\t

54

hts

Set tab stop

\EH

55

ich

Insert n characters

\E[%p1%d@

56

il

Insert n lines

\E[%p1%dL

57

il1

Insert line

\E[L

58

ind

Scroll forward

\n

59

indn

Scroll forward n

\E[%p1%dS

60

initc

Initialize color

\E]4;%p1%d;rgb:%p2%{255}%*%{1000}%/%2.2X/%p3%{255}%*%{100...

61

invis

Invisible cursor

\E[8m

62

is2

Init 2 string

\E[!p\E[?3;4l\E[4l\E>

63

it

Init tabs

8

64

kDC

Shifted delete-char key

\E[3;2~

65

kEND

Shifted end key

\E[1;2F

66

kHOM

Shifted home key

\E[1;2H

67

kIC

Shifted insert-char key

\E[2;2~

68

kLFT

Shifted left-arrow key

\E[1;2D

69

kNXT

Shifted next-page key

\E[6;2~

70

kPRV

Shifted previous-page key

\E[5;2~

71

kRIT

Shifted right-arrow key

\E[1;2C

72

kb2

Keypad center

\EOE

73

kbs

Backspace key



74

kcbt

Back-tab key

\E[Z

75

kcub1

Left arrow key

\EOD

76

kcud1

Down arrow key

\EOB

77

kcuf1

Right arrow key

\EOC

78

kcuu1

Up arrow key

\EOA

79

kdch1

Delete character key

\E[3~

80

kend

End key

\EOF

81

kent

Enter/send key

\EOM

82

kf1

Function key F1

\EOP

83

khome

Home key

\EOH

84

kich1

Insert character key

\E[2~

85

kind

Scroll-down key

\E[1;2B

86

km

Has meta key

1

87

kmous

Mouse key

\E[<

88

knp

Next page key

\E[6~

89

kpp

Previous page key

\E[5~

90

kri

Scroll-up key

\E[1;2A

91

lines

Lines

24

92

mc5i

Will not echo input

1

93

mir

Move in insert mode

1

94

msgr

Move in standout mode

1

95

npc

No pad character

1

96

oc

Original colors

\E]104\a

97

op

Original pair

\E[39;49m

98

pairs

Max color pairs

32767

99

rc

Restore cursor

\E8

100

rep

Repeat character

%p1%c\E[%p2%{1}%-%db

101

rev

Enter reverse mode

\E[7m

102

ri

Reverse index

\EM

103

rin

Scroll reverse n

\E[%p1%dT

104

ritm

Exit italics mode

\E[23m

105

rmacs

Exit alternate charset mode

\E(B

106

rmam

Disable line wrap

\E[?7l

107

rmcup

Exit alt screen

\E[?1049l\E[23;0;0t

108

rmir

Exit insert mode

\E[4l

109

rmkx

Keypad local mode

\E[?1l\E>

110

rmm

Reset meta mode

\E[?1034l

111

rmso

Exit standout mode

\E[27m

112

rmul

Exit underline mode

\E[24m

113

rs1

Reset string 1

\Ec\E]104\a

114

rs2

Reset string 2

\E[!p\E[?3;4l\E[4l\E>

115

sc

Save cursor

\E7

116

setab

Set background color

\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%...

117

setaf

Set foreground color

\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p...

118

sgr

Set attributes

%?%p9%t\E(0%e\E(B%;\E[0%?%p6%t;1%;%?%p5%t;2%;%?%p2%t;4%;%...

119

sgr0

Reset attributes

\E(B\E[m

120

sitm

Enter italics mode

\E[3m

121

smacs

Enter alternate charset mode

\E(0

122

smam

Enable line wrap

\E[?7h

123

smcup

Enter alt screen

\E[?1049h\E[22;0;0t

124

smir

Enter insert mode

\E[4h

125

smkx

Keypad transmit mode

\E[?1h\E=

126

smso

Enter standout mode

\E[7m

127

smul

Enter underline mode

\E[4m

128

tbc

Clear all tabs

\E[3g

129

tsl

To status line

\E]0;

130

u6

CPR response format

\E[%i%d;%dR

131

u7

CPR request

\E[6n

132

u8

DA response format

\E[?%[;0123456789]c

133

u9

DA request

\E[c

134

vpa

Vertical position

\E[%i%p1%dd

135

xenl

Newline glitch

1

136

xm

Exit marks mode (kitty)

\E[<%i%p3%d;%p1%d;%p2%d;%?%p4%tM%em%;

The XTGETTCAP sequence (DCS + q Pt ST) allows applications to query terminfo capabilities directly from the terminal emulator, rather than relying on the system terminfo database.

Text Sizing Protocol (OSC 66)

WezTerm does not support the Text Sizing protocol.

Truecolor Support

WezTerm supports 24-bit truecolor, detectable via:

  • XTGETTCAP (RGB capability): yes (RGB)

  • DECRQSS (truecolor probe): no

  • COLORTERM: yes (truecolor)

OSC 52 Clipboard Support

WezTerm supports OSC 52 clipboard operations (detected via XTGETTCAP Ms).

  • DA1 extension 52: no

  • XTGETTCAP Ms: yes

Terminal Identification

WezTerm is identified as WezTerm version 20240203-110809-5046fc22 (detected via XTVERSION + XTGETTCAP TN).

  • XTVERSION (raw): WezTerm 20240203-110809-5046fc22

  • XTVERSION: yes

  • XTGETTCAP TN: yes (WezTerm)

  • ENQ: no

  • TERM_PROGRAM: yes (WezTerm)

  • TERM: no (xterm-256color)

Reproduction

To reproduce these results for WezTerm, install and run ucs-detect with the following commands:

uvx ucs-detect --rerun data/wezterm.yaml

Test Performance

The test suite completed in 92.16 seconds (92s).

  • Mean CPU: 97.6%

  • Mean RSS: 178.5 MB

  • Total time: 92.2s

CPU usage over time

CPU usage during test execution for WezTerm.

RSS memory over time

RSS memory usage during test execution for WezTerm.

Duration comparison

Test duration for WezTerm compared to all other terminals.

CPU % vs Duration

CPU % vs duration trade-off for WezTerm.