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* Print elapsed evaluation time.

This commit is contained in:
Eelco Dolstra 2012-02-04 13:27:11 +00:00
parent ce86a9a0ae
commit 2bda12ef3b
1 changed files with 9 additions and 1 deletions
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10
src/libexpr/eval.cc
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@ -7,6 +7,8 @@
#include <cstring>
#include <unistd.h>
#include <sys/time.h>
#include <sys/resource.h>
#if HAVE_BOEHMGC
@ -1279,12 +1281,18 @@ bool EvalState::eqValues(Value & v1, Value & v2)
void EvalState::printStats()
{
char x;
bool showStats = getEnv("NIX_SHOW_STATS", "0") != "0";
Verbosity v = showStats ? lvlInfo : lvlDebug;
printMsg(v, "evaluation statistics:");
struct rusage buf;
getrusage(RUSAGE_SELF, &buf);
float cpuTime = buf.ru_utime.tv_sec + ((float) buf.ru_utime.tv_usec / 1000000);
printMsg(v, format(" time elapsed: %1%") % cpuTime);
printMsg(v, format(" size of a value: %1%") % sizeof(Value));
printMsg(v, format(" expressions evaluated: %1%") % nrEvaluated);
char x;
printMsg(v, format(" stack space used: %1% bytes") % (&x - deepestStack));
printMsg(v, format(" max eval() nesting depth: %1%") % maxRecursionDepth);
printMsg(v, format(" stack space per eval() level: %1% bytes")