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Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

hit time

How long an access takes when the data is found in the cache.

Hit time is the latency of an access that hits at a given cache level, including the time to check whether it hits.

See also

cache hit average memory access time
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