fboss

Repository

fboss

Facebook Open Switching System Software for controlling network switches.

576.8Performance (ETV)

35%Growth

65%KTLO

Average Developer Performance (ETV)

Year-by-year Trend:+526%

2026Previous year

Repository Performance Breakdown

Performance has many faces. Navigara breaks down the effort to visualize what parts of codebase has been changed and where energy flowed. Our Architect AI can break the performance even further into particular components and patterns.

Change Type Distribution

Breakdown of file changes over time. Play the timeline to see how change types evolved across periods.

Jan 2025 · 907 changes

Jan 2025Mar 2025Jun 2025Aug 2025Oct 2025Jan 2026Mar 2026

Bug Attribution

Beta

Monthly overview of bugs introduced and fixed, based on symbol-level commit analysis. Fixes show whether the original author fixed their own bug (self-fix) or someone else did (cross-fix).

1469Bugs Attributed

27%Self-fix Rate

Jasmeet BaggaTop Introducer (130)

Jasmeet BaggaTop Fixer (177)

How it works

Methodology

Bug attribution uses symbol-level matching from commit history. For each fix commit, we look at the changed symbols (functions, classes, methods) and trace backwards to find who last modified that symbol in a non-fix commit. This person is the probable bug introducer. The algorithm only works when commits have symbol-level data from the Navigara analysis engine — the coverage rate shows what percentage of fix commits had this data available.

The Semantic Problem: Growth vs. Fixes Inversion

The current metrics model has a semantic inversion: when developer A creates a feature with a bug, they receive grow (positive). When developer B fixes that bug, they receive waste (negative). The bug creator is rewarded while the fixer is penalized. Bug attribution addresses this by explicitly tracking who introduced bugs and who fixed them, providing a more accurate picture of code quality contributions.

Proposed API Endpoint

Currently computed client-side from commit data. Ideal server-side endpoint:

POST /v1/repositories/{repositoryId}/bug-attributions
Content-Type: application/json

Request:
{
  "startTime": "2025-01-01T00:00:00Z",
  "endTime": "2025-12-31T23:59:59Z"
}

Response:
{
  "totalBugsAttributed": 42,
  "selfFixRate": 35,
  "coverageRate": 78,
  "attributions": [
    {
      "filePath": "src/lib/auth.ts",
      "symbol": "validateToken",
      "introducer": { "name": "Alice", "email": "alice@co.com", "commitSha": "abc123" },
      "fixer": { "name": "Bob", "email": "bob@co.com", "commitSha": "def456" },
      "fixedAt": "2025-06-15T10:30:00Z",
      "isSelfFix": false
    }
  ]
}

Investment Quality

Beta

Reclassifies engineering effort based on bug attribution. Commits that introduced bugs are retrospectively counted as poor investments.

42%Productive TimeGrowth 70% + Fixes 30%

48%Maintenance Time

10%Wasted Time

How it works

Methodology

Investment Quality reclassifies engineering effort based on bug attribution data. Commits identified as buggy origins (those that introduced bugs later fixed by someone) have their grow and maintenance time moved into the Wasted Time category. Their waste (fix commits) remains counted as productive. All other commits retain their standard classification: grow is productive, maintenance is maintenance, and waste (fixes) is productive.

Relationship to Growth / Maintenance / Fixes

The standard model classifies commits as Growth, Maintenance, or Fixes. Investment Quality adds a quality lens: a commit that introduced a bug is retrospectively counted as a poor investment — the engineering time spent on it was wasted because it ultimately required additional fix work. Fix commits (Fixes in the standard model) are reframed as productive, because fixing bugs is valuable work.

Proposed API Endpoint

Currently computed client-side from commit and bug attribution data. Ideal server-side endpoint:

POST /v1/organizations/{orgId}/investment-quality
Content-Type: application/json

Request:
{
  "startTime": "2025-01-01T00:00:00Z",
  "endTime": "2025-12-31T23:59:59Z",
  "bucketSize": "BUCKET_SIZE_MONTH",
  "groupBy": ["repository_id" | "deliverer_email"]
}

Response:
{
  "productivePct": 74,
  "maintenancePct": 18,
  "wastedPct": 8,
  "buckets": [
    {
      "bucketStart": "2025-01-01T00:00:00Z",
      "productive": 4.2,
      "maintenance": 1.8,
      "wasted": 0.6
    }
  ]
}

Recent Activity

Latest analyzed commits in this repository.

Hash	Message	Author	Effort
4824e3f	small typos and formatting fixes	Scott Smith	maint
f61e94f	Clarify fpga_info requirements	Scott Smith	maint
a70a1be	Port led naming does not depend on number of leds	Scott Smith	maint
3f92c5f	Update led color example to amber	Scott Smith	maint
4dc6fd9	Create revamped on-diff jobs for FBOSS OSS; test local changes in OSS via sandcastle	Kevin Yakar	waste
9cc804b	Move explicit template instantiations from CmdHandlerImpl.cpp to individual .cpp files (OSS commands with existing .cpp)	Joseph Wu	maint
32521f2	Create .cpp files for clear/ commands and move implementations out of headers	Joseph Wu	maint
b0fc8ed	Add --community-names flag to rib-policy commands	Rob Skoog	grow
a2c44ce	Add PROFILE_200G_2_PAM4_RS544_COPPER	Mohammed Al-Sanabani	–
13bada5	Assert watchdog open fails if already opened	Scott Smith	maint

4824e3fScott Smith

small typos and formatting fixes

maint

f61e94fScott Smith

Clarify fpga_info requirements

maint

a70a1beScott Smith

Port led naming does not depend on number of leds

maint

3f92c5fScott Smith

Update led color example to amber

maint

4dc6fd9Kevin Yakar

Create revamped on-diff jobs for FBOSS OSS; test local changes in OSS via sandcastle

waste

9cc804bJoseph Wu

Move explicit template instantiations from CmdHandlerImpl.cpp to individual .cpp files (OSS commands with existing .cpp)

maint

32521f2Joseph Wu

Create .cpp files for clear/ commands and move implementations out of headers

maint

b0fc8edRob Skoog

Add --community-names flag to rib-policy commands

grow

a2c44ceMohammed Al-Sanabani

Add PROFILE_200G_2_PAM4_RS544_COPPER

–

13bada5Scott Smith

Assert watchdog open fails if already opened

maint

Complexity & Impact

Average context complexity and engagement score of file changes over time. Higher complexity means more intricate changes; higher impact means broader effect on the codebase.

Top Contributors

Contributors ranked by total performance (ETV) from analyzed commits.

#
1	Jasmeet Bagga932 commits	55.2	15.1	35.4	4.7
2	Shrikrishna (Shri) Khare932 commits	31.8	10.5	19	2.2
3	Shiva Menta265 commits	31.6	11.2	16.9	3.5
4	Parvez Shaikh458 commits	31.3	9.8	14.8	6.8
5	Nivin Lawrence367 commits	28.5	16.7	7.7	4.2
6	Ron He432 commits	27.1	6.5	16.2	4.3
7	Priyank Warkhede176 commits	25.2	8.9	13.5	2.8
8	Wei Dai277 commits	23.1	8.2	8.3	6.6
9	Ravi Vantipalli235 commits	20.8	6.5	12.1	2.1
10	Harshit Gulati196 commits	19.9	6	8.4	5.5
11	benoit-nexthop45 commits	17.4	7.3	8.6	1.6
12	Scott Smith216 commits	17.3	7.4	8.4	1.6
13	Max Ng176 commits	15.9	3.1	10.1	2.7
14	Midhun Somasundaran187 commits	15.6	8.4	5.6	1.7
15	Sayeed Tasnim164 commits	14.7	4.6	8.7	1.3
16	Tanmaya Udupa142 commits	13.7	3.4	9.7	0.6
17	Manikandan Somasundaram185 commits	12.6	4.3	6.5	1.8
18	Ashutosh Grewal267 commits	11.8	3.3	7.9	0.6
19	Mohammed Al-Sanabani153 commits	11.5	4.4	5.5	1.5
20	Prasoon Patel147 commits	9.1	3.3	4	1.7
21	Elangovan Natarajan88 commits	8.8	4	4.3	0.5
22	Tianyu Du83 commits	8	3	3.3	1.7
23	Protick Bhowmick100 commits	7.8	4.6	2.1	1.1
24	Joseph Wu81 commits	7.1	1.4	5.2	0.5
25	genkzgnluxbjeyb534 commits	7.1	2.6	4.4	0.1
26	Togis Thomas67 commits	6.8	4.4	1.7	0.8
27	Joan Olguy Canéus64 commits	6.2	2.9	3.2	0.1
28	Bin Huang83 commits	5.9	0.8	4.9	0.2
29	Santhosh Nagaraj107 commits	5.4	0.8	4.3	0.3
30	Ruinan Hu83 commits	5.4	1.9	2.8	0.7
31	Pranav Raghavan66 commits	4.6	1.3	3.2	0.2
32	generatedunixname103015177559215860 commits	4.6	0	4.6	0
33	Siva Muthusamy80 commits	4.2	2.1	1.2	0.9
34	Roman Choporov60 commits	3.7	1.4	1.8	0.6
35	Lohith Chittineni88 commits	3.5	1.7	1.7	0.1
36	Jeffrey Leung86 commits	3.4	1	1.1	1.3
37	Chet Powers43 commits	3.2	1.5	1.1	0.7
38	Kevin Yakar103 commits	3.2	1.1	1.7	0.5
39	Mike Choi35 commits	3	0.7	2.2	0.2
40	Jagadeesh Babu Challagundla26 commits	2.9	1.5	1.4	0.1
41	Travis Brown31 commits	2.7	1.5	1	0.1
42	Vasant Patil52 commits	2.6	1.2	1	0.5
43	Uchenna Mark Ezeobi42 commits	2.4	1.3	1	0.2
44	Paul Cruz83 commits	2.4	0.7	1.4	0.3
45	generatedunixname537391475639613143 commits	2.3	0	2.3	0
46	joywu-coder25 commits	2.2	1	0.5	0.7
47	Richard Barnes60 commits	2.2	0	2.1	0
48	Jitendra Verma53 commits	2.1	0.1	1.7	0.4
49	Justin Kim32 commits	1.9	0.9	0.7	0.4
50	Aristidis Papaioannou38 commits	1.7	0	1.7	0
51	Huy Chu14 commits	1.5	1.3	0.1	0.1
52	Shai Szulanski5 commits	1.5	0	1.5	0
53	Daniel Zhu19 commits	1.3	0.6	0.4	0.2
54	generatedunixname22671463979362115 commits	1.1	0	1.1	0
55	CliffyWong26 commits	1	0.8	0.2	0.1
56	edward20 commits	1	0.7	0.1	0.2
57	Prashasthi Melanta20 commits	1	0.3	0.4	0.3
58	Arjun Chaturvedi18 commits	1	0.3	0.4	0.3
59	aalamsi2229 commits	1	0.8	0.1	0.1
60	Brandon Chuang33 commits	0.9	0.7	0.1	0.1
61	chee-zhang21 commits	0.8	0.5	0.1	0.2
62	Tung-Chun Chang15 commits	0.7	0.4	0.2	0.1
63	generatedunixname47856480124344514 commits	0.5	0	0.5	0
64	generatedunixname8900200528756446 commits	0.4	0.1	0.3	0
65	Yedidya Feldblum4 commits	0.4	0	0.4	0.1
66	Tao Ren28 commits	0.3	0	0.2	0.1
67	TJ Yin6 commits	0.3	0	0.2	0.1
68	Lu Pan3 commits	0.3	0	0	0.2
69	Harsh Chokshi7 commits	0.2	0	0.2	0
70	Alex Hornby25 commits	0.1	0.1	0	0
71	Alper Yoney2 commits	0.1	0	0.1	0
72	Satish Kumar5 commits	0.1	0.1	0	0

File Hotspots

Beta

Files with the highest combination of change frequency and waste ratio. These are candidates for refactoring or closer review.

Developer Momentum

Beta

Cumulative contribution over time. Watch developers race as positions shift month by month.

Work Patterns

Beta

Commit activity distribution by hour and day of week across all contributors in this repository.

POST /v1/repositories/{repositoryId}/bug-attributions Content-Type: application/json Request: { "startTime": "2025-01-01T00:00:00Z", "endTime": "2025-12-31T23:59:59Z" } Response: { "totalBugsAttributed": 42, "selfFixRate": 35, "coverageRate": 78, "attributions": [ { "filePath": "src/lib/auth.ts", "symbol": "validateToken", "introducer": { "name": "Alice", "email": "alice@co.com", "commitSha": "abc123" }, "fixer": { "name": "Bob", "email": "bob@co.com", "commitSha": "def456" }, "fixedAt": "2025-06-15T10:30:00Z", "isSelfFix": false } ] }

POST /v1/organizations/{orgId}/investment-quality Content-Type: application/json Request: { "startTime": "2025-01-01T00:00:00Z", "endTime": "2025-12-31T23:59:59Z", "bucketSize": "BUCKET_SIZE_MONTH", "groupBy": ["repository_id" | "deliverer_email"] } Response: { "productivePct": 74, "maintenancePct": 18, "wastedPct": 8, "buckets": [ { "bucketStart": "2025-01-01T00:00:00Z", "productive": 4.2, "maintenance": 1.8, "wasted": 0.6 } ] }

Hash

Message

Author

Effort

4824e3f

small typos and formatting fixes

Scott Smith

maint

f61e94f

Clarify fpga_info requirements

Scott Smith

maint

a70a1be

Port led naming does not depend on number of leds

Scott Smith

maint

3f92c5f

Update led color example to amber

Scott Smith

maint

4dc6fd9

Create revamped on-diff jobs for FBOSS OSS; test local changes in OSS via sandcastle

Kevin Yakar

waste

9cc804b

Move explicit template instantiations from CmdHandlerImpl.cpp to individual .cpp files (OSS commands with existing .cpp)

Joseph Wu

maint

32521f2

Create .cpp files for clear/ commands and move implementations out of headers

Joseph Wu

maint

b0fc8ed

Add --community-names flag to rib-policy commands

Rob Skoog

grow

a2c44ce

Add PROFILE_200G_2_PAM4_RS544_COPPER

Mohammed Al-Sanabani

–

13bada5

Assert watchdog open fails if already opened

Scott Smith

maint

Jasmeet Bagga932 commits

55.2

15.1

35.4

4.7

Shrikrishna (Shri) Khare932 commits

31.8

10.5

2.2

Shiva Menta265 commits

31.6

11.2

16.9

3.5

Parvez Shaikh458 commits

31.3

9.8

14.8

6.8

Nivin Lawrence367 commits

28.5

16.7

7.7

4.2

Ron He432 commits

27.1

6.5

16.2

4.3

Priyank Warkhede176 commits

25.2

8.9

13.5

2.8

Wei Dai277 commits

23.1

8.2

8.3

6.6

Ravi Vantipalli235 commits

20.8

6.5

12.1

2.1

Harshit Gulati196 commits

19.9

8.4

5.5

benoit-nexthop45 commits

17.4

7.3

8.6

1.6

Scott Smith216 commits

17.3

7.4

8.4

1.6

Max Ng176 commits

15.9

3.1

10.1

2.7

Midhun Somasundaran187 commits

15.6

8.4

5.6

1.7

Sayeed Tasnim164 commits

14.7

4.6

8.7

1.3

Tanmaya Udupa142 commits

13.7

3.4

9.7

0.6

Manikandan Somasundaram185 commits

12.6

4.3

6.5

1.8

Ashutosh Grewal267 commits

11.8

3.3

7.9

0.6

Mohammed Al-Sanabani153 commits

11.5

4.4

5.5

1.5

Prasoon Patel147 commits

9.1

3.3

1.7

Elangovan Natarajan88 commits

8.8

4.3

0.5

Tianyu Du83 commits

3.3

1.7

Protick Bhowmick100 commits

7.8

4.6

2.1

1.1

Joseph Wu81 commits

7.1

1.4

5.2

0.5

genkzgnluxbjeyb534 commits

7.1

2.6

4.4

0.1

Togis Thomas67 commits

6.8

4.4

1.7

0.8

Joan Olguy Canéus64 commits

6.2

2.9

3.2

0.1

Bin Huang83 commits

5.9

0.8

4.9

0.2

Santhosh Nagaraj107 commits

5.4

0.8

4.3

0.3

Ruinan Hu83 commits

5.4

1.9

2.8

0.7

Pranav Raghavan66 commits

4.6

1.3

3.2

0.2

generatedunixname103015177559215860 commits

4.6

Siva Muthusamy80 commits

4.2

2.1

1.2

0.9

Roman Choporov60 commits

3.7

1.4

1.8

0.6

Lohith Chittineni88 commits

3.5

1.7

0.1

Jeffrey Leung86 commits

3.4

1.1

1.3

Chet Powers43 commits

3.2

1.5

1.1

0.7

Kevin Yakar103 commits

3.2

1.1

1.7

0.5

Mike Choi35 commits

0.7

2.2

0.2

Jagadeesh Babu Challagundla26 commits

2.9

1.5

1.4

0.1

Travis Brown31 commits

2.7

1.5

0.1

Vasant Patil52 commits

2.6

1.2

0.5

Uchenna Mark Ezeobi42 commits

2.4

1.3

0.2

Paul Cruz83 commits

2.4

0.7

1.4

0.3

generatedunixname537391475639613143 commits

2.3

joywu-coder25 commits

2.2

0.5

0.7

Richard Barnes60 commits

2.2

2.1

Jitendra Verma53 commits

2.1

0.1

1.7

0.4

Justin Kim32 commits

1.9

0.9

0.7

0.4

Aristidis Papaioannou38 commits

1.7

Huy Chu14 commits

1.5

1.3

0.1

Shai Szulanski5 commits

1.5

Daniel Zhu19 commits

1.3

0.6

0.4

0.2

generatedunixname22671463979362115 commits

1.1

CliffyWong26 commits

0.8

0.2

0.1

edward20 commits

0.7

0.1

0.2

Prashasthi Melanta20 commits

0.3

0.4

0.3

Arjun Chaturvedi18 commits

0.3

0.4

0.3

aalamsi2229 commits

0.8

0.1

Brandon Chuang33 commits

0.9

0.7

0.1

chee-zhang21 commits

0.8

0.5

0.1

0.2

Tung-Chun Chang15 commits

0.7

0.4

0.2

0.1

generatedunixname47856480124344514 commits

0.5

generatedunixname8900200528756446 commits

0.4

0.1

0.3

Yedidya Feldblum4 commits

0.4

0.1

Tao Ren28 commits

0.3

0.2

0.1

TJ Yin6 commits

0.3

0.2

0.1

Lu Pan3 commits

0.3

0.2

Harsh Chokshi7 commits

0.2

Alex Hornby25 commits

0.1

Alper Yoney2 commits

0.1

Satish Kumar5 commits

0.1