@ytiskw asked 150 fictional personas 12 questions each about whether they would adopt a product. They report about 1.8 yen and about 5 seconds, including Japan–US latency.

石川陽太 Yota Ishikawa (@ytiskw) published this on 2026-09-17. @ytiskw asked 150 fictional personas 12 questions each about whether they would adopt a product. They report about 1.8 yen and about 5 seconds, including Japan–US latency. 話題のJevで架空のペルソナ150人に製品の導入意向を聞く仕組みを作ってみた。150人ごとに12個の質問をAPIで投げる。 実際にかかった費用は、1.8円でかかった時間は約5秒。十分爆速だけど日本↔︎アメリカのレイテンシが含まれているので本来はもっと早いはず https://t.co/6lbFXY9jjH How Jev or TypeSafe is used, in the post's own words: “話題のJevで架空のペルソナ150人に製品の導入意向を聞く仕組みを作ってみた。150人ごとに12個の質問をAPIで投げる。” The post does not name a separate audience. It is for people reading what @ytiskw shows here (it includes media). When this page was compiled from the post, the recorded public counts were 230880 views, 1046 likes, 875 bookmarks, and 82 reposts. Those figures are the post's own metrics.