That’s a hell of an assumption. I know a number of Arm GCC and LLVM hackers who are all employed by various companies including Arm themselves. It’s in chip designers/manufacturers interest to have good GCC support for their architecture.
Of course hardware vendors have a vested interested in GCC support, and of course there are a lot of people paid to work on GCC! But the claim above was that GCC and Linux are “mostly” maintained by people paid to work on them. I don’t actually know how to measure that (I thought I might be able to find a quick answer by googling, but no such luck), but even if it’s true now, I seriously doubt it’s been true for the majority of GCC’s very long history.
I also specifically didn’t mention LLVM because it’s very closely associated with both Apple and Google.
The other claim was that fewer Rust maintainers are paid to work on Rust. But there are in fact quite a few people paid to work on Rust full time, and there have been throughout its history; most obviously at Mozilla, but even though Mozilla has since let go of its Rust language team, Amazon has a significant team of Rust maintainers (several of them from Mozilla), and I believe Facebook, Microsoft, Intel, and possibly Google do as well.
So as far as I can tell, (early) GCC, Linux, and Rust all have a mix of paid and unpaid maintainers.
It looks like a lot of mappings need adding as most people come up as unknown:
EDIT updated with newer mappings.
Top changeset contributors by employer
(Unknown) 11190 (62.7%)
(None) 4280 (24.0%)
Huawei 862 (4.8%)
Ferrous Systems 630 (3.5%)
Academics (various) 563 (3.2%)
Red Hat 124 (0.7%)
Google 102 (0.6%)
Microsoft 59 (0.3%)
IBM 28 (0.2%)
Funky 11 (0.1%)
Top lines changed by employer
(Unknown) 1018418 (56.9%)
(None) 484385 (27.0%)
Academics (various) 118247 (6.6%)
Ferrous Systems 100533 (5.6%)
Huawei 45443 (2.5%)
Red Hat 16009 (0.9%)
Microsoft 3359 (0.2%)
Google 2844 (0.2%)
Funky 447 (0.0%)
IBM 388 (0.0%)
the top contributors over the last year were:
Developers with the most changesets
Michael Goulet 1027 (5.7%)
Nicholas Nethercote 789 (4.4%)
Ralf Jung 763 (4.3%)
Camille Gillot 727 (4.1%)
Lukas Wirth 640 (3.6%)
Guillaume Gomez 583 (3.3%)
bjorn3 550 (3.1%)
Oliver Scherer 470 (2.6%)
Michael Howell 293 (1.6%)
Waffle Lapkin 266 (1.5%)
Esteban Küber 251 (1.4%)
Zalathar 249 (1.4%)
lcnr 247 (1.4%)
y21 221 (1.2%)
Jynn Nelson 188 (1.1%)
Urgau 187 (1.0%)
Nilstrieb 170 (1.0%)
Centri3 169 (0.9%)
hamidreza kalbasi 164 (0.9%)
Pietro Albini 156 (0.9%)
Developers with the most changed lines
Laurențiu Nicola 163716 (9.1%)
Philipp Krones 118974 (6.6%)
Lukas Wirth 100948 (5.6%)
Camille Gillot 94829 (5.3%)
Oleksandr Babak 89625 (5.0%)
Michael Goulet 83965 (4.7%)
Oliver Scherer 39890 (2.2%)
Nicholas Nethercote 39484 (2.2%)
Ralf Jung 38113 (2.1%)
hamidreza kalbasi 34576 (1.9%)
Ben Kimock 33647 (1.9%)
Guillaume Gomez 30774 (1.7%)
bjorn3 29218 (1.6%)
Zalathar 26214 (1.5%)
Esteban Küber 24612 (1.4%)
Alex Macleod 23724 (1.3%)
y21 20447 (1.1%)
Centri3 20168 (1.1%)
Urgau 19964 (1.1%)
Michael Howell 19795 (1.1%)
I didn’t know about gitdm; that’s a handy tool! Looks like those are just based on the domain of the email addresses used for commits, so it doesn’t necessarily indicate whether the company employees people specifically to work on GCC. But I think you’re right, that does indicate quite a lot of corporate support for the project.
The gitdm scripts come from LWN who do a regular “who writes the kernel” report but can work on any git repo.
You can be fairly certain that patches coming from a corporate domain are paid for their time. You can add extra metadata to track people who use personal or org addresses if they confirm it’s a paid gig. The project I work on most is about 75% paid contributors with hobbyists and academics making up the rest. The good unpaid contributors can often get hired if they want to be.
That’s a hell of an assumption. I know a number of Arm GCC and LLVM hackers who are all employed by various companies including Arm themselves. It’s in chip designers/manufacturers interest to have good GCC support for their architecture.
Of course hardware vendors have a vested interested in GCC support, and of course there are a lot of people paid to work on GCC! But the claim above was that GCC and Linux are “mostly” maintained by people paid to work on them. I don’t actually know how to measure that (I thought I might be able to find a quick answer by googling, but no such luck), but even if it’s true now, I seriously doubt it’s been true for the majority of GCC’s very long history.
I also specifically didn’t mention LLVM because it’s very closely associated with both Apple and Google.
The other claim was that fewer Rust maintainers are paid to work on Rust. But there are in fact quite a few people paid to work on Rust full time, and there have been throughout its history; most obviously at Mozilla, but even though Mozilla has since let go of its Rust language team, Amazon has a significant team of Rust maintainers (several of them from Mozilla), and I believe Facebook, Microsoft, Intel, and possibly Google do as well.
So as far as I can tell, (early) GCC, Linux, and Rust all have a mix of paid and unpaid maintainers.
I added gitdm stats awhile back although the mappings could certainly do with some clean-up. For the last year of activity the stats are:
Top changeset contributors by employer Red Hat 1807 (17.6%) juzhe.zhong@rivai.ai 814 (7.9%) AdaCore 795 (7.8%) ARM 778 (7.6%) SUSE 649 (6.3%) Intel 475 (4.6%) Code Sourcery 366 (3.6%) Automatic Admin 360 (3.5%) pierre-emmanuel.patry@embecosm.com 347 (3.4%) IBM 201 (2.0%) Top lines changed by employer juzhe.zhong@rivai.ai 1392979 (25.9%) SiFive 1236220 (23.0%) Code Sourcery 676611 (12.6%) Red Hat 416369 (7.8%) ARM 309116 (5.8%) gaiusmod2@gmail.com 300270 (5.6%) chenxiaolong@loongson.cn 174876 (3.3%) Automatic Admin 160200 (3.0%) Intel 86657 (1.6%) AdaCore 60414 (1.1%)Sorry, what project is this? GCC?
Sorry yes this was GCC, I can do the same for the rust repo if you want.
That would be helpful! Thank you.
It looks like a lot of mappings need adding as most people come up as unknown:
EDIT updated with newer mappings.
Top changeset contributors by employer (Unknown) 11190 (62.7%) (None) 4280 (24.0%) Huawei 862 (4.8%) Ferrous Systems 630 (3.5%) Academics (various) 563 (3.2%) Red Hat 124 (0.7%) Google 102 (0.6%) Microsoft 59 (0.3%) IBM 28 (0.2%) Funky 11 (0.1%) Top lines changed by employer (Unknown) 1018418 (56.9%) (None) 484385 (27.0%) Academics (various) 118247 (6.6%) Ferrous Systems 100533 (5.6%) Huawei 45443 (2.5%) Red Hat 16009 (0.9%) Microsoft 3359 (0.2%) Google 2844 (0.2%) Funky 447 (0.0%) IBM 388 (0.0%)the top contributors over the last year were:
Developers with the most changesets Michael Goulet 1027 (5.7%) Nicholas Nethercote 789 (4.4%) Ralf Jung 763 (4.3%) Camille Gillot 727 (4.1%) Lukas Wirth 640 (3.6%) Guillaume Gomez 583 (3.3%) bjorn3 550 (3.1%) Oliver Scherer 470 (2.6%) Michael Howell 293 (1.6%) Waffle Lapkin 266 (1.5%) Esteban Küber 251 (1.4%) Zalathar 249 (1.4%) lcnr 247 (1.4%) y21 221 (1.2%) Jynn Nelson 188 (1.1%) Urgau 187 (1.0%) Nilstrieb 170 (1.0%) Centri3 169 (0.9%) hamidreza kalbasi 164 (0.9%) Pietro Albini 156 (0.9%) Developers with the most changed lines Laurențiu Nicola 163716 (9.1%) Philipp Krones 118974 (6.6%) Lukas Wirth 100948 (5.6%) Camille Gillot 94829 (5.3%) Oleksandr Babak 89625 (5.0%) Michael Goulet 83965 (4.7%) Oliver Scherer 39890 (2.2%) Nicholas Nethercote 39484 (2.2%) Ralf Jung 38113 (2.1%) hamidreza kalbasi 34576 (1.9%) Ben Kimock 33647 (1.9%) Guillaume Gomez 30774 (1.7%) bjorn3 29218 (1.6%) Zalathar 26214 (1.5%) Esteban Küber 24612 (1.4%) Alex Macleod 23724 (1.3%) y21 20447 (1.1%) Centri3 20168 (1.1%) Urgau 19964 (1.1%) Michael Howell 19795 (1.1%)I didn’t know about gitdm; that’s a handy tool! Looks like those are just based on the domain of the email addresses used for commits, so it doesn’t necessarily indicate whether the company employees people specifically to work on GCC. But I think you’re right, that does indicate quite a lot of corporate support for the project.
The gitdm scripts come from LWN who do a regular “who writes the kernel” report but can work on any git repo.
You can be fairly certain that patches coming from a corporate domain are paid for their time. You can add extra metadata to track people who use personal or org addresses if they confirm it’s a paid gig. The project I work on most is about 75% paid contributors with hobbyists and academics making up the rest. The good unpaid contributors can often get hired if they want to be.