This is a test of the CF KV .get() method and wether or not Cloudflare treats .get() calls that don't hit a valid KV value that as a billed read or not. I assumed they would but this is to test that. On my personal Cloudflare account with no other KV traffic I observed the following results:
when I ran the test (originally with 10k) I got several thousand nulls back. Then between 7500-7750 calls after a few seconds I got this:
7500 [ { status: 'fulfilled', value: null }, ... (41 more lines like this) { status: 'fulfilled', value: null }, { status: 'rejected', reason: [Error: KV GET failed: 500 Internal Server Error] }, { status: 'rejected', reason: [Error: KV GET failed: 500 Internal Server Error] }, ...(4 Identical responses) { status: 'rejected', reason: [Error: KV GET failed: 500 Internal Server Error] }, { status: 'fulfilled', value: null }, { status: 'fulfilled', value: null }, { status: 'fulfilled', value: null }, { status: 'rejected', reason: [Error: KV GET failed: 500 Internal Server Error] }, { status: 'fulfilled', value: null }, { status: 'rejected', reason: [Error: KV GET failed: 500 Internal Server Error] }, { status: 'rejected', reason: [Error: KV GET failed: 500 Internal Server Error] }, { status: 'fulfilled', value: null }, { status: 'rejected', reason: [Error: KV GET failed: 500 Internal Server Error] }, { status: 'fulfilled', value: null }, { status: 'rejected', reason: Error: internal error; reference = 0abtb855rncldl1s2ctop0l4 at [object Object] at async Object.fetch (file:///C:/Users/JudahHellandSr/projects/public/cf-kv-test/src/index.ts:28:20) at async jsonError (file:///C:/Users/JudahHellandSr/projects/public/cf-kv-test/node_modules/wrangler/templates/middleware/middleware-miniflare3-json-error.ts:22:10) at async drainBody (file:///C:/Users/JudahHellandSr/projects/public/cf-kv-test/node_modules/wrangler/templates/middleware/middleware-ensure-req-body-drained.ts:5:10) { remote: true } }, ...(many such cases) { status: 'rejected', reason: Error: internal error; reference = vvi2a0mm1jru41uc424g6h9u at [object Object] at async Object.fetch (file:///C:/Users/JudahHellandSr/projects/public/cf-kv-test/src/index.ts:28:20) at async jsonError (file:///C:/Users/JudahHellandSr/projects/public/cf-kv-test/node_modules/wrangler/templates/middleware/middleware-miniflare3-json-error.ts:22:10) at async drainBody (file:///C:/Users/JudahHellandSr/projects/public/cf-kv-test/node_modules/wrangler/templates/middleware/middleware-ensure-req-body-drained.ts:5:10) { remote: true } }, ... 150 more items ] 7750 ⎔ Shutting down local server... ⎔ Shutting down remote connection... Terminate batch job (Y/N)?
For obvious reasons (please don't hate me cloudflare) I shut it down at this point.
In round two I ran it with some writes and reads of values that ARE there so I can know once those metrics show up whether they counted the... 10k or so misses that I threw at it.