criterion performance measurements

overview

want to understand this report?

Word32/printf

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 1.536981570043631e-6 1.5514655581167907e-6 1.5886010572307786e-6
Standard deviation 3.810078560158444e-8 6.774124480538762e-8 1.259785482509006e-7

Outlying measurements have severe (0.5891603348512913%) effect on estimated standard deviation.

Word32/showHex

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 1.2760109915902572e-7 1.2853724573609164e-7 1.2967737033771725e-7
Standard deviation 2.7841290137645084e-9 3.780478873064417e-9 4.8329185706619764e-9

Outlying measurements have moderate (0.44718215753059226%) effect on estimated standard deviation.

Word32/xbuild

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 3.282780208074934e-7 3.411793596896122e-7 3.663549395982028e-7
Standard deviation 3.477511918468043e-8 5.2955855579933917e-8 7.176604900757127e-8

Outlying measurements have severe (0.9589758958231043%) effect on estimated standard deviation.

Word32/xbuildu

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 3.9676427515399716e-7 4.0783377014950056e-7 4.2193065718260677e-7
Standard deviation 2.6526903919912055e-8 4.220099889326817e-8 6.16294105836812e-8

Outlying measurements have severe (0.903456632891851%) effect on estimated standard deviation.

Word32/xshowl

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 4.7384212182640497e-7 4.786413519439609e-7 4.848746249354143e-7
Standard deviation 1.246117586139819e-8 1.6892409532132195e-8 2.310770280621286e-8

Outlying measurements have severe (0.5111591246934704%) effect on estimated standard deviation.

Word32/xshowlp

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 5.162387815144622e-7 5.259252162596607e-7 5.37385285014246e-7
Standard deviation 2.619207153081674e-8 3.332279647291653e-8 4.307148364000975e-8

Outlying measurements have severe (0.7706448412074517%) effect on estimated standard deviation.

Word32/xshowlu

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 5.980486724429498e-7 6.093298923319493e-7 6.278415321474831e-7
Standard deviation 3.2089229883353357e-8 4.834637114491929e-8 7.621744512222333e-8

Outlying measurements have severe (0.8432480513842034%) effect on estimated standard deviation.

Word32/xshowlpu

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 5.927387559523927e-7 6.020710047542299e-7 6.173146968693954e-7
Standard deviation 2.2613298823506995e-8 3.685595378263953e-8 5.777811585599681e-8

Outlying measurements have severe (0.7591264669360107%) effect on estimated standard deviation.

Word32/xshow

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 5.038082721968536e-7 5.147912760664756e-7 5.371449813479116e-7
Standard deviation 2.418232047939545e-8 4.8574774667003966e-8 1.0603348425722795e-7

Outlying measurements have severe (0.882726157614506%) effect on estimated standard deviation.

Word32/xshowp

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 5.398751322078301e-7 5.457994315842402e-7 5.591650843188845e-7
Standard deviation 1.679881828507219e-8 2.816563630296205e-8 5.0254548152647034e-8

Outlying measurements have severe (0.6880251164700695%) effect on estimated standard deviation.

Word32/xshowu

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 5.7570566645222e-7 5.802058691290143e-7 5.871563269594317e-7
Standard deviation 1.0848794885812115e-8 1.8456129337286982e-8 2.922310141141794e-8

Outlying measurements have moderate (0.45320297785362906%) effect on estimated standard deviation.

Word32/xshowpu

lower bound estimate upper bound
OLS regression xxx xxx xxx
R² goodness-of-fit xxx xxx xxx
Mean execution time 6.253283322651222e-7 6.357214633587154e-7 6.532380868058045e-7
Standard deviation 2.3979522909402098e-8 4.718727343830783e-8 8.821967132758944e-8

Outlying measurements have severe (0.8236838397896818%) effect on estimated standard deviation.

understanding this report

In this report, each function benchmarked by criterion is assigned a section of its own. The charts in each section are active; if you hover your mouse over data points and annotations, you will see more details.

Under the charts is a small table. The first two rows are the results of a linear regression run on the measurements displayed in the right-hand chart.

We use a statistical technique called the bootstrap to provide confidence intervals on our estimates. The bootstrap-derived upper and lower bounds on estimates let you see how accurate we believe those estimates to be. (Hover the mouse over the table headers to see the confidence levels.)

A noisy benchmarking environment can cause some or many measurements to fall far from the mean. These outlying measurements can have a significant inflationary effect on the estimate of the standard deviation. We calculate and display an estimate of the extent to which the standard deviation has been inflated by outliers.