Game speed results over the first 4 eras on V38+ code base. First 2 eras ran at SVN 9919 (V38.1), last 2 at SVN 9924. There have been significant SVN changes to technology costs and game speed parameters since then, so these results are not a reliable baseline.
Key game set-up options: (full list provided in attachments)
- Monarch difficulty, Marathon speed, 4 AI opponents, leader Elizabeth of England but set-up for no leader traits (leader choice still defines base available cultures), Small Temperate Earth-like "C2C_World" map, Medium Sea levels, Old World Start and Plenty of Rivers
- No Tech Handicaps for Humans set “On”; Win For Losing set “On” and No Tech Diffusion set “Off”
- No Tech Trading and No Tech Brokering both set to “On”
- Beeline Sting set “Off”
- Upscaled Building and Unit Costs set “On” (change from my previous tests, difficult to tell the impact)
My Key Observations:
(1) My first 2 Era completion turn counts and calendar dates are in the range I expected, but the next 2 seem a bit fast in terms of calendar date (at least IMHO, experts may differ). I expect they will change in future testing due to recent SVN fixes and corrections (in particular, AI modifications to unit selection - I focused too much on building military units instead of science due to the apparent AI lead in military strength, not realizing it was based on large numbers of weak and inappropriate units (for example, in the Medieval era 1 AI city had 160 defenders, of which 133 were outriggers and 20 were missionaries).
(2) Generally able to run at 100% science and a significant per-turn gold surplus (even with the military overbuilding described above).
(3) I run on old i5-2410M hardware (2 cores, 4 threads), with C2C generally at about 30% CPU ("turbo" mode as a single-threaded 32-bit application). This was the first time I have noticed Windows Task Manager showing 80% to 90% CPU usage for C2C for a period of 10 to 15 seconds during between-my-turns AI processing (which currently runs 30 to 45 seconds on my hardware, which I think is faster than before). I am guessing this is a result of recent SVN performance enhancements to increase multi-threading - if so, it is VERY VERY impressive, and HUGE kudos to the modders!
Measurements:
(1) Logged the sequence, turn count and beaker cost for each technology learned. I intended to measure the impact on game speed of 2 game styles ("slow path, learn all techs in their own era" versus "fast path, learn minimum number of techs in each era"), plus the impact of Beeline Stings in "fast path". Stopped without doing "fast path" due to obsolete code base.
(2) Recorded turn counts and dates for the "end" of each era (aligning with Tech Tree and TechInfo.xml "era number" usage), versus my previous reporting of completion of each "gateway" Tech (which are technically the first tech in the following era, usually 3 to 5 turns later).
Results:
(1) Completed Prehistoric Era at turn 357 in 5893 BC (and completed Sedentary Lifestyle 3 turns later), 3 to 6 techs behind every AI. Slightly behind the 2 leading AIs on score; about 25% ahead on military strength. Learned 97 techs (0 of them free), out of 99 (95 mandatory for fast path), at average 3.7 turns and 185 beakers per tech.
(2) Completed Ancient Era at turn 687 in 1776 BC (and completed Classical Lifestyle 4 turns later), 35 to 40 techs behind the 3 leading AIs. Third place on scoreboard (about 10% behind the leading AI); second on military strength (about 45% behind). Surprisingly (at least to me), despite my huge technology lag I had the top 3 cities on the "Top 5" screen, and the #1 city for technology beakers. Learned 80 techs (5 of them free), out of 91 (80 mandatory for fast path), at average 4.2 turns and 1650 beakers per tech.
(3) Completed Classical Era at turn 835 in 0 AD (and completed Medieval Lifestyle 4 turns later), 12 to 26 techs behind the 3 leading AIs. Third place on scoreboard (about 25% behind the leading AI); third on military strength (about 50% behind). Still had the top 3 cities on the "Top 5" screen, and improved to having 3 of the top 5 cities in global ranking for science beakers. Learned 51 techs (3 of them free), out of 60 (51 mandatory for fast path), at average 2.9 turns and 5600 beakers per tech.
(4) Completed Medieval Era at turn 1007 in 1088 AD (and completed Renaissance Lifestyle on the same turn number, using a Great Person for a free tech), 9 to 27 techs behind the 3 leading AIs. Second place on scoreboard (about 15% behind the leading AI); fourth on military strength (up to 65% behind). Now have the top 5 cities on the "Top 5" screen, and staying about the same at 3 of the top 7 cities in global ranking for science beakers. Learned 51 techs (4 of them free), out of 54 (46 mandatory for fast path), at average 3.4 turns and 13,500 beakers per tech.