Differential D2016 Diff 5692 src/script/scriptcache.cpp

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src/script/scriptcache.cpp

Show All 20 Lines	void InitScriptExecutionCache() {
// setup_bytes creates the minimum possible cache (2 elements).		// setup_bytes creates the minimum possible cache (2 elements).
size_t nMaxCacheSize =		size_t nMaxCacheSize =
std::min(std::max(int64_t(0),		std::min(std::max(int64_t(0),
gArgs.GetArg("-maxscriptcachesize",		gArgs.GetArg("-maxscriptcachesize",
DEFAULT_MAX_SCRIPT_CACHE_SIZE)),		DEFAULT_MAX_SCRIPT_CACHE_SIZE)),
MAX_MAX_SCRIPT_CACHE_SIZE) *		MAX_MAX_SCRIPT_CACHE_SIZE) *
(size_t(1) << 20);		(size_t(1) << 20);
size_t nElems = scriptExecutionCache.setup_bytes(nMaxCacheSize);		size_t nElems = scriptExecutionCache.setup_bytes(nMaxCacheSize);
LogPrintf("Using %zu MiB out of %zu requested for script execution cache, "		LogPrint(BCLog::SCRIPT,
		"Using %zu MiB out of %zu requested for script execution cache, "
"able to store %zu elements\n",		"able to store %zu elements\n",
(nElems * sizeof(uint256)) >> 20, nMaxCacheSize >> 20, nElems);		(nElems * sizeof(uint256)) >> 20, nMaxCacheSize >> 20, nElems);
}		}

uint256 GetScriptCacheKey(const CTransaction &tx, uint32_t flags) {		uint256 GetScriptCacheKey(const CTransaction &tx, uint32_t flags) {
uint256 key;		uint256 key;
// We only use the first 19 bytes of nonce to avoid a second SHA round -		// We only use the first 19 bytes of nonce to avoid a second SHA round -
// giving us 19 + 32 + 4 = 55 bytes (+ 8 + 1 = 64)		// giving us 19 + 32 + 4 = 55 bytes (+ 8 + 1 = 64)
static_assert(55 - sizeof(flags) - 32 >= 128 / 8,		static_assert(55 - sizeof(flags) - 32 >= 128 / 8,
"Want at least 128 bits of nonce for script execution cache");		"Want at least 128 bits of nonce for script execution cache");
Show All 22 Lines