i tested how many frames the spawning pool boost for left side #1 saves:

-left side #1 (no pool)
cycle:
160
158
161
167
167
159
167
167
167
167
-
avg: 164

-left side #1 (with pool):
cycle:
161
167
167
159
158
158
158
158
158
158
158
158
160
158
-
avg: 159.714

conclusion: avg 4.286f faster