John McCall Add us as a preferred source on Google
🔄 Data last refreshed 19 days ago
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🔒 Paid proposals held safely in escrow — released only when the work's approved.
Followers
1.7K
Account age
3 yrs
💰 Suggested sponsorship rate
$40 – $65 / sponsored post
Estimated from audience size & typical reach — every deal is negotiable and held in SocialDB escrow.
🎁 Free analysisfor John McCall
📊 Post engagement
Recent posts · likes + reposts
Mar 25latest
13
Avg engagement / post
5–29
Typical post (engagement)
0.8%
Engagement vs followers
60/100
Consistent reach
Nov 2022
On Mastodon since
Half of recent posts land between 5 and 29 likes + reposts (median 9) — a dependable floor a sponsored post can count on.
🔥 Top post: I'm pleased to announce that SE-0529: Add FilePath to the Standa · 36 likes + reposts
📊 Activity & format
Posting cadence
0.81 / week
A lower-frequency account — each post lands with more weight.
Content mix
Mostly text
Recent: 12 text · 0 image · 0 video.
Follower / following
4.8×
Follows 361 back. A more reciprocal / networked account.
Recent posts
View on Mastodon ↗
I'm pleased to announce that SE-0532: "Optional non-copyable improvements and generalizations" has been accepted!
https://forums.swift.org/t/accepted-with-modifications-se-0532-optional-noncopyable-improvements-and-generalizations/88126/1
This was a couple weeks ago, but I didn't realize the talks were all already up.
Anyway, not my most fluently-delivered talk, and time limits really cut into what I wanted to say, but hopefully people can get an idea of what we're working …
Oh, so, I gave a talk at PLDI this year! The theme is all about how we approach the language design of Swift, balancing high-level usability with providing the tighter control that's necessary for low-level programming. A lot of this story…
There’s a lot of social criticism and satire in all of her work, but in Sanditon she really does just lay into some of these people. An awful lot of this book so far has been mocking the shit out of Sir Edward Denham
Finally getting around to reading Sanditon (the Marie Dobbs continuation, though I haven’t gotten to that part yet). Interestingly, it’s very openly satirical of most of its characters; it makes me wonder if Austen was tending that way or …
SE-0532: "Optional noncopyable improvements and generalizations" has been revised with some small naming changes; we welcome feedback on the new names.
https://forums.swift.org/t/se-0532-optional-noncopyable-improvements-and-generalization…
I'm pleased to announce that SE-0529: "Add FilePath to the Standard Library" has been accepted!
https://forums.swift.org/t/accepted-with-modifications-se-0529-filepath/87125
I'm pleased to announce that SE-0532: "Optional noncopyable improvements and generalizations" is now in review!
https://forums.swift.org/t/se-0532-optional-noncopyable-improvements-and-generalizations/86941
I have never been more embarrassed about getting a perfect on Connections
I'm pleased to announce that SE-0523: Hashable conformance for UnownedTaskExecutor has been accepted!
https://forums.swift.org/t/accepted-se-0523-hashable-conformance-for-unownedtaskexecutor/85931
I'm pleased to announce that SE-0523: Hashable conformance for UnsafeTaskExecutor is now in review! A pretty straightforward one, but we follow the process.
https://forums.swift.org/t/se-0523-hashable-conformance-for-unownedtaskexecutor/85…
🐘 Community & instance
Home server
hachyderm.io
A tech & engineering server — its members and audience skew toward that niche, so expect a community-aligned, engaged following.
On Mastodon since
Nov 2022
Joined in the Twitter-exodus wave of late 2022 — part of the migration that made Mastodon a real destination.
💡 Facts
🗓️Joined Mastodon in 2022 — 3 years ago.
👁️Averages 13 views per post.
📤Posts about 0.8× per week.
🕵️ Fake follower check
Estimated43/100
Fair
Credibility score
73%
Mixed
Real audience
Medium
Fake-follower risk
High
Data confidence
- Est. 73% real, active audience · Medium fake-follower risk.
- Low engagement (~0.8% of followers engage each post) — a sign of an inflated or inactive audience.
- Established account (3+ years old).
Heuristic estimate from engagement, follower ratios, account age & growth — a screening signal, not a guarantee.
About
Language designer and implementer at Apple: Swift, Objective-C, C++, C. Erstwhile editor of the Itanium C++ ABI. Focus on security mitigations and low-level language implementation.
🔀 Audience overlap
EstimatedEstimated shared audience with similar creators — useful for avoiding overlap (or doubling down) when planning a campaign.
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