问为什么在PowerShell中"for($i=1；$i -le 1000000；$i++){}“的执行时间比"for([int]$i=1；$i -le 1000000；$i++){}”快

EN

# Step 1
$start = get-date
for($i=1; $i -le 1000000; $i++){}
$end = get-date
($end-$start).TotalMilliseconds
Remove-Variable i

# Step 2
$start = get-date
for([int]$i=1; $i -le 1000000; $i++){}
$end = get-date
($end-$start).TotalMilliseconds
Remove-Variable i

# Step 3
$start = get-date
for([int64]$i=1; $i -le 1000000; $i++){}
$end = get-date
($end-$start).TotalMilliseconds
Remove-Variable i

# Step 4
$start = get-date
for([float]$i=1; $i -le 1000000; $i++){}
$end = get-date
($end-$start).TotalMilliseconds
Remove-Variable i

# Step 5
$start = get-date
for([double]$i=1; $i -le 1000000; $i++){}
$end = get-date
($end-$start).TotalMilliseconds
Remove-Variable i

# Step 6
$start = get-date
for($i=1; $i -le 1000000; $i++){}
$end = get-date
($end-$start).TotalMilliseconds
Remove-Variable i