COMPARE files=2 base=case-light-touch.txt size_mib=200 mode=touch

[耗时表]
file                          ballast runs  fill_ms avg/min/max                  unit  mmap_us unmap_ms   faults
----------------------------------------------------------------------------------------------------------------
case-light-touch.txt                0    5   36.42 /  35.25 /  37.62      2845.5 ns/page     12.8     10.5    12800
case-heavy-touch.txt             3600    5   40.46 /  37.81 /  42.56      3160.8 ns/page     12.2     14.1    12800

[pre_* 申请前快照] (每轮申请时刻前均值, MiB; N/A=平台无此指标)
指标             case-light-touch.txt  case-heavy-touch.txt         Δ
-------------------------------------------------------------------
total                        5735.0                5735.0     +0.0%
free                         3651.6                 277.8    -92.4%
avail                           N/A                   N/A         -
free_spec                    3890.8                 311.8    -92.0%
file                          710.4                 515.8    -27.4%
anon                          451.0                4049.2   +797.8%
swap_comp                     329.0                 325.8     -1.0%
comp_occ                      117.0                 113.0     -3.4%

[post_* 申请驻留时快照] (fill 后驻留期均值, MiB)
指标             case-light-touch.txt  case-heavy-touch.txt         Δ
-------------------------------------------------------------------
total                        5735.0                5735.0     +0.0%
free                         3462.4                  93.2    -97.3%
avail                           N/A                   N/A         -
free_spec                    3701.0                 113.0    -96.9%
file                          709.8                 501.6    -29.3%
anon                          651.2                4248.0   +552.3%
swap_comp                     329.0                 325.8     -1.0%
comp_occ                      117.0                 113.0     -3.4%

[驻留开销 post−pre] (申请 SIZE 对系统状态的净影响, MiB)
指标             case-light-touch.txt  case-heavy-touch.txt
---------------------------------------------------------
total                          +0.0                  +0.0
free                         -189.2                -184.6
avail                             -                     -
free_spec                    -189.8                -198.8
file                           -0.6                 -14.2
anon                         +200.2                +198.8
swap_comp                      +0.0                  +0.0
comp_occ                       +0.0                  +0.0

DELTA case-heavy-touch.txt         vs base: fill_ms=+11.1% unit=+11.1% unmap_ms=+34.2% faults=+0.0% pre_free=-92.4%

# 机器可读行 (key=value, 与用例记录同风格):
ROW file=case-light-touch.txt size_mib=200 mode=touch ballast_mib=0 runs=5 fill_ms_avg=36.423 fill_ms_min=35.252 fill_ms_max=37.617 unit_avg=2845.5 unit_label=ns/page mmap_us_avg=12.8 unmap_ms_avg=10.475 faults_avg=12800.0 majflt_avg=0.0 pre_total_avg=5735.0 pre_free_avg=3651.6 pre_avail_avg=-1 pre_free_spec_avg=3890.8 pre_file_avg=710.4 pre_anon_avg=451.0 pre_swap_comp_avg=329.0 pre_comp_occ_avg=117.0 post_total_avg=5735.0 post_free_avg=3462.4 post_avail_avg=-1 post_free_spec_avg=3701.0 post_file_avg=709.8 post_anon_avg=651.2 post_swap_comp_avg=329.0 post_comp_occ_avg=117.0
ROW file=case-heavy-touch.txt size_mib=200 mode=touch ballast_mib=3600 runs=5 fill_ms_avg=40.459 fill_ms_min=37.807 fill_ms_max=42.564 unit_avg=3160.8 unit_label=ns/page mmap_us_avg=12.2 unmap_ms_avg=14.060 faults_avg=12800.0 majflt_avg=0.0 pre_total_avg=5735.0 pre_free_avg=277.8 pre_avail_avg=-1 pre_free_spec_avg=311.8 pre_file_avg=515.8 pre_anon_avg=4049.2 pre_swap_comp_avg=325.8 pre_comp_occ_avg=113.0 post_total_avg=5735.0 post_free_avg=93.2 post_avail_avg=-1 post_free_spec_avg=113.0 post_file_avg=501.6 post_anon_avg=4248.0 post_swap_comp_avg=325.8 post_comp_occ_avg=113.0
DELTA file=case-heavy-touch.txt vs=case-light-touch.txt fill_ms_pct=+11.1% unit_pct=+11.1% unmap_ms_pct=+34.2% faults_pct=+0.0% pre_total_pct=+0.0% pre_free_pct=-92.4% pre_free_spec_pct=-92.0% pre_file_pct=-27.4% pre_anon_pct=+797.8% pre_swap_comp_pct=-1.0% pre_comp_occ_pct=-3.4% post_total_pct=+0.0% post_free_pct=-97.3% post_free_spec_pct=-96.9% post_file_pct=-29.3% post_anon_pct=+552.3% post_swap_comp_pct=-1.0% post_comp_occ_pct=-3.4%