Weishen/Hydro
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core: reduce default integrate cache size

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undefined committed 2022-05-11 19:42:36 +08:00
1 parent fed6daae51
commit a9a7b3a451
1 file changed
+3 -3
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packages/hydrooj/src/lib/difficulty.ts
+3 -3
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@@ -6,7 +6,7 @@ const _CACHE_INFO = {
function _LOGP(x: number) { function _LOGP(x: number) {
const sqrtPi = 2.506628274631; // Sqrt[Pi] const sqrtPi = 2.506628274631; // Sqrt[Pi]
return (2 * Math.exp(-1.0 * (Math.log(x) ** 2) * 2)) / x / sqrtPi; return (2 * Math.exp(-2.0 * (Math.log(x) ** 2))) / x / sqrtPi;
} }
function _intergrateEnsureCache(y: number) { function _intergrateEnsureCache(y: number) {
@@ -27,7 +27,7 @@ function _intergrateEnsureCache(y: number) {
return _CACHE_INFO; return _CACHE_INFO;
} }
_intergrateEnsureCache(1000000); _intergrateEnsureCache(10000);
function _integrate(y: number) { function _integrate(y: number) {
_intergrateEnsureCache(y); _intergrateEnsureCache(y);
@@ -38,7 +38,7 @@ function difficultyAlgorithm(nSubmit: number, nAccept: number) {
if (!nSubmit) return null; if (!nSubmit) return null;
const s = _integrate(nSubmit); const s = _integrate(nSubmit);
const acRate = nAccept / nSubmit; const acRate = nAccept / nSubmit;
const ans = Math.round(10.0 - 1.30 * s * 10.0 * acRate); const ans = Math.round(10 - 13 * s * acRate);
return Math.max(ans, 1); return Math.max(ans, 1);
} }