diff --git a/Cargo.toml b/Cargo.toml
index ef5d5f5..09b92a9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,4 +37,5 @@ serde_json = "1.0"
 siphasher = "0.3.3"
 
 [dependencies]
+mem_dbg = {version="0.2.4", optional=true}
 serde = { version = "1.0", default-features = false, features = ["derive"] }
diff --git a/evaluation/src/main.rs b/evaluation/src/main.rs
index d1b9fc1..ce2387e 100644
--- a/evaluation/src/main.rs
+++ b/evaluation/src/main.rs
@@ -12,6 +12,7 @@ use rayon::prelude::*;
 
 use hyperloglogplus::{HyperLogLog, HyperLogLogPF, HyperLogLogPlus};
 
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 struct PassThroughHasher(u64);
 
 impl Hasher for PassThroughHasher {
@@ -30,6 +31,7 @@ impl Hasher for PassThroughHasher {
     }
 }
 
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 struct PassThroughHasherBuilder;
 
 impl BuildHasher for PassThroughHasherBuilder {
@@ -40,6 +42,7 @@ impl BuildHasher for PassThroughHasherBuilder {
     }
 }
 
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 struct Estimation(u64, u64);
 
 impl fmt::Display for Estimation {
diff --git a/src/common.rs b/src/common.rs
index 514a40d..11fd0f0 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -8,6 +8,10 @@ macro_rules! registers_impls {
     ($len:expr, $ident:ident) => {
         // A Registers struct.
         #[derive(Clone, Debug, Serialize, Deserialize)]
+        #[cfg_attr(
+            feature = "mem_dbg",
+            derive(mem_dbg::MemDbg, mem_dbg::MemSize)
+        )]
         pub struct $ident {
             // A buffer containing registers.
             buf:   Vec<u32>,
diff --git a/src/constants.rs b/src/constants.rs
index 1e57fbd..67dff66 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -1,6 +1,5 @@
 // raw estimates to determine bias as determined by Google.
 pub const RAW_ESTIMATE_DATA: &[&[f64]] = &[
-    // precision 4
     &[
         11.0, 11.717, 12.207, 12.7896, 13.2882, 13.8204, 14.3772, 14.9342,
         15.5202, 16.161, 16.7722, 17.4636, 18.0396, 18.6766, 19.3566, 20.0454,
@@ -13,62 +12,66 @@ pub const RAW_ESTIMATE_DATA: &[&[f64]] = &[
         63.9744, 64.914, 65.781, 67.1806, 68.0594, 68.8446, 69.7928, 70.8248,
         71.8324, 72.8598, 73.6246, 74.7014, 75.393, 76.6708, 77.2394,
     ],
-    // precision 5
     &[
-        23.0, 23.1194, 23.8208, 24.2318, 24.77, 25.2436, 25.7774, 26.2848,
-        26.8224, 27.3742, 27.9336, 28.503, 29.0494, 29.6292, 30.2124, 30.798,
-        31.367, 31.9728, 32.5944, 33.217, 33.8438, 34.3696, 35.0956, 35.7044,
-        36.324, 37.0668, 37.6698, 38.3644, 39.049, 39.6918, 40.4146, 41.082,
-        41.687, 42.5398, 43.2462, 43.857, 44.6606, 45.4168, 46.1248, 46.9222,
-        47.6804, 48.447, 49.3454, 49.9594, 50.7636, 51.5776, 52.331, 53.19,
-        53.9676, 54.7564, 55.5314, 56.4442, 57.3708, 57.9774, 58.9624, 59.8796,
-        60.755, 61.472, 62.2076, 63.1024, 63.8908, 64.7338, 65.7728, 66.629,
-        67.413, 68.3266, 69.1524, 70.2642, 71.1806, 72.0566, 72.9192, 73.7598,
-        74.3516, 75.5802, 76.4386, 77.4916, 78.1524, 79.1892, 79.8414, 80.8798,
-        81.8376, 82.4698, 83.7656, 84.331, 85.5914, 86.6012, 87.7016, 88.5582,
-        89.3394, 90.3544, 91.4912, 92.308, 93.3552, 93.9746, 95.2052, 95.727,
-        97.1322, 98.3944, 98.7588, 100.242, 101.1914, 102.2538, 102.8776,
-        103.6292, 105.1932, 105.9152, 107.0868, 107.6728, 108.7144, 110.3114,
-        110.8716, 111.245, 112.7908, 113.7064, 114.636, 115.7464, 116.1788,
-        117.7464, 118.4896, 119.6166, 120.5082, 121.7798, 122.9028, 123.4426,
-        124.8854, 125.705, 126.4652, 128.3464, 128.3462, 130.0398, 131.0342,
-        131.0042, 132.4766, 133.511, 134.7252, 135.425, 136.5172, 138.0572,
-        138.6694, 139.3712, 140.8598, 141.4594, 142.554, 143.4006, 144.7374,
-        146.1634, 146.8994, 147.605, 147.9304, 149.1636, 150.2468, 151.5876,
-        152.2096, 153.7032, 154.7146, 155.807, 156.9228, 157.0372, 158.5852,
+        23.0, 23.119_4, 23.820_8, 24.231_8, 24.77, 25.243_6, 25.777_4,
+        26.284_8, 26.822_4, 27.374_2, 27.933_6, 28.503, 29.049_4, 29.629_2,
+        30.212_4, 30.798, 31.367, 31.972_8, 32.594_4, 33.217, 33.843_8,
+        34.369_6, 35.095_6, 35.704_4, 36.324, 37.066_8, 37.669_8, 38.364_4,
+        39.049, 39.691_8, 40.414_6, 41.082, 41.687, 42.539_8, 43.246_2, 43.857,
+        44.660_6, 45.416_8, 46.124_8, 46.922_2, 47.680_4, 48.447, 49.345_4,
+        49.959_4, 50.763_6, 51.577_6, 52.331, 53.19, 53.967_6, 54.756_4,
+        55.531_4, 56.444_2, 57.370_8, 57.977_4, 58.962_4, 59.879_6, 60.755,
+        61.472, 62.207_6, 63.102_4, 63.890_8, 64.733_8, 65.772_8, 66.629,
+        67.413, 68.326_6, 69.152_4, 70.264_2, 71.180_6, 72.056_6, 72.919_2,
+        73.759_8, 74.351_6, 75.580_2, 76.438_6, 77.491_6, 78.152_4, 79.189_2,
+        79.841_4, 80.879_8, 81.837_6, 82.469_8, 83.765_6, 84.331, 85.591_4,
+        86.601_2, 87.701_6, 88.558_2, 89.339_4, 90.354_4, 91.491_2, 92.308,
+        93.355_2, 93.974_6, 95.205_2, 95.727, 97.132_2, 98.394_4, 98.758_8,
+        100.242, 101.191_4, 102.253_8, 102.877_6, 103.629_2, 105.193_2,
+        105.915_2, 107.086_8, 107.672_8, 108.714_4, 110.311_4, 110.871_6,
+        111.245, 112.790_8, 113.706_4, 114.636, 115.746_4, 116.178_8,
+        117.746_4, 118.489_6, 119.616_6, 120.508_2, 121.779_8, 122.902_8,
+        123.442_6, 124.885_4, 125.705, 126.465_2, 128.346_2, 128.346_4,
+        130.039_8, 131.004_2, 131.034_2, 132.476_6, 133.511, 134.725_2,
+        135.425, 136.517_2, 138.057_2, 138.669_4, 139.371_2, 140.859_8,
+        141.459_4, 142.554, 143.400_6, 144.737_4, 146.163_4, 146.899_4,
+        147.605, 147.930_4, 149.163_6, 150.246_8, 151.587_6, 152.209_6,
+        153.703_2, 154.714_6, 155.807, 156.922_8, 157.037_2, 158.585_2,
     ],
-    // precision 6
     &[
-        46.0, 46.1902, 47.271, 47.8358, 48.8142, 49.2854, 50.317, 51.354,
-        51.8924, 52.9436, 53.4596, 54.5262, 55.6248, 56.1574, 57.2822, 57.837,
-        58.9636, 60.074, 60.7042, 61.7976, 62.4772, 63.6564, 64.7942, 65.5004,
-        66.686, 67.291, 68.5672, 69.8556, 70.4982, 71.8204, 72.4252, 73.7744,
-        75.0786, 75.8344, 77.0294, 77.8098, 79.0794, 80.5732, 81.1878, 82.5648,
-        83.2902, 84.6784, 85.3352, 86.8946, 88.3712, 89.0852, 90.499, 91.2686,
-        92.6844, 94.2234, 94.9732, 96.3356, 97.2286, 98.7262, 100.3284,
-        101.1048, 102.5962, 103.3562, 105.1272, 106.4184, 107.4974, 109.0822,
-        109.856, 111.48, 113.2834, 114.0208, 115.637, 116.5174, 118.0576,
-        119.7476, 120.427, 122.1326, 123.2372, 125.2788, 126.6776, 127.7926,
-        129.1952, 129.9564, 131.6454, 133.87, 134.5428, 136.2, 137.0294,
-        138.6278, 139.6782, 141.792, 143.3516, 144.2832, 146.0394, 147.0748,
-        148.4912, 150.849, 151.696, 153.5404, 154.073, 156.3714, 157.7216,
-        158.7328, 160.4208, 161.4184, 163.9424, 165.2772, 166.411, 168.1308,
-        168.769, 170.9258, 172.6828, 173.7502, 175.706, 176.3886, 179.0186,
-        180.4518, 181.927, 183.4172, 184.4114, 186.033, 188.5124, 189.5564,
-        191.6008, 192.4172, 193.8044, 194.997, 197.4548, 198.8948, 200.2346,
-        202.3086, 203.1548, 204.8842, 206.6508, 206.6772, 209.7254, 210.4752,
-        212.7228, 214.6614, 215.1676, 217.793, 218.0006, 219.9052, 221.66,
-        223.5588, 225.1636, 225.6882, 227.7126, 229.4502, 231.1978, 232.9756,
-        233.1654, 236.727, 238.1974, 237.7474, 241.1346, 242.3048, 244.1948,
-        245.3134, 246.879, 249.1204, 249.853, 252.6792, 253.857, 254.4486,
-        257.2362, 257.9534, 260.0286, 260.5632, 262.663, 264.723, 265.7566,
-        267.2566, 267.1624, 270.62, 272.8216, 273.2166, 275.2056, 276.2202,
-        278.3726, 280.3344, 281.9284, 283.9728, 284.1924, 286.4872, 287.587,
-        289.807, 291.1206, 292.769, 294.8708, 296.665, 297.1182, 299.4012,
-        300.6352, 302.1354, 304.1756, 306.1606, 307.3462, 308.5214, 309.4134,
-        310.8352, 313.9684, 315.837, 316.7796, 318.9858,
+        46.0, 46.190_2, 47.271, 47.835_8, 48.814_2, 49.285_4, 50.317, 51.354,
+        51.892_4, 52.943_6, 53.459_6, 54.526_2, 55.624_8, 56.157_4, 57.282_2,
+        57.837, 58.963_6, 60.074, 60.704_2, 61.797_6, 62.477_2, 63.656_4,
+        64.794_2, 65.500_4, 66.686, 67.291, 68.567_2, 69.855_6, 70.498_2,
+        71.820_4, 72.425_2, 73.774_4, 75.078_6, 75.834_4, 77.029_4, 77.809_8,
+        79.079_4, 80.573_2, 81.187_8, 82.564_8, 83.290_2, 84.678_4, 85.335_2,
+        86.894_6, 88.371_2, 89.085_2, 90.499, 91.268_6, 92.684_4, 94.223_4,
+        94.973_2, 96.335_6, 97.228_6, 98.726_2, 100.328_4, 101.104_8,
+        102.596_2, 103.356_2, 105.127_2, 106.418_4, 107.497_4, 109.082_2,
+        109.856, 111.48, 113.283_4, 114.020_8, 115.637, 116.517_4, 118.057_6,
+        119.747_6, 120.427, 122.132_6, 123.237_2, 125.278_8, 126.677_6,
+        127.792_6, 129.195_2, 129.956_4, 131.645_4, 133.87, 134.542_8, 136.2,
+        137.029_4, 138.627_8, 139.678_2, 141.792, 143.351_6, 144.283_2,
+        146.039_4, 147.074_8, 148.491_2, 150.849, 151.696, 153.540_4, 154.073,
+        156.371_4, 157.721_6, 158.732_8, 160.420_8, 161.418_4, 163.942_4,
+        165.277_2, 166.411, 168.130_8, 168.769, 170.925_8, 172.682_8,
+        173.750_2, 175.706, 176.388_6, 179.018_6, 180.451_8, 181.927,
+        183.417_2, 184.411_4, 186.033, 188.512_4, 189.556_4, 191.600_8,
+        192.417_2, 193.804_4, 194.997, 197.454_8, 198.894_8, 200.234_6,
+        202.308_6, 203.154_8, 204.884_2, 206.650_8, 206.677_2, 209.725_4,
+        210.475_2, 212.722_8, 214.661_4, 215.167_6, 217.793, 218.000_6,
+        219.905_2, 221.66, 223.558_8, 225.163_6, 225.688_2, 227.712_6,
+        229.450_2, 231.197_8, 232.975_6, 233.165_4, 236.727, 237.747_4,
+        238.197_4, 241.134_6, 242.304_8, 244.194_8, 245.313_4, 246.879,
+        249.120_4, 249.853, 252.679_2, 253.857, 254.448_6, 257.236_2,
+        257.953_4, 260.028_6, 260.563_2, 262.663, 264.723, 265.756_6,
+        267.162_4, 267.256_6, 270.62, 272.821_6, 273.216_6, 275.205_6,
+        276.220_2, 278.372_6, 280.334_4, 281.928_4, 283.972_8, 284.192_4,
+        286.487_2, 287.587, 289.807, 291.120_6, 292.769, 294.870_8, 296.665,
+        297.118_2, 299.401_2, 300.635_2, 302.135_4, 304.175_6, 306.160_6,
+        307.346_2, 308.521_4, 309.413_4, 310.835_2, 313.968_4, 315.837,
+        316.779_6, 318.985_8,
     ],
-    // precision 7
     &[
         92.0, 93.4934, 94.9758, 96.4574, 97.9718, 99.4954, 101.5302, 103.0756,
         104.6374, 106.1782, 107.7888, 109.9522, 111.592, 113.2532, 114.9086,
@@ -1170,7 +1173,6 @@ pub const RAW_ESTIMATE_DATA: &[&[f64]] = &[
 
 // bias estimates for the corresponding raw estimate as determined by Google.
 pub const BIAS_DATA: &[&[f64]] = &[
-    // precision 4
     &[
         10.0,
         9.717,
@@ -1252,372 +1254,58 @@ pub const BIAS_DATA: &[&[f64]] = &[
         -1.3292,
         -1.7606,
     ],
-    // precision 5
     &[
-        22.0,
-        21.1194,
-        20.8208,
-        20.2318,
-        19.77,
-        19.2436,
-        18.7774,
-        18.2848,
-        17.8224,
-        17.3742,
-        16.9336,
-        16.503,
-        16.0494,
-        15.6292,
-        15.2124,
-        14.798,
-        14.367,
-        13.9728,
-        13.5944,
-        13.217,
-        12.8438,
-        12.3696,
-        12.0956,
-        11.7044,
-        11.324,
-        11.0668,
-        10.6698,
-        10.3644,
-        10.049,
-        9.6918,
-        9.4146,
-        9.082,
-        8.687,
-        8.5398,
-        8.2462,
-        7.857,
-        7.6606,
-        7.4168,
-        7.1248,
-        6.9222,
-        6.6804,
-        6.447,
-        6.3454,
-        5.9594,
-        5.7636,
-        5.5776,
-        5.331,
-        5.19,
-        4.9676,
-        4.7564,
-        4.5314,
-        4.4442,
-        4.3708,
-        3.9774,
-        3.9624,
-        3.8796,
-        3.755,
-        3.472,
-        3.2076,
-        3.1024,
-        2.8908,
-        2.7338,
-        2.7728,
-        2.629,
-        2.413,
-        2.3266,
-        2.1524,
-        2.2642,
-        2.1806,
-        2.0566,
-        1.9192,
-        1.7598,
-        1.3516,
-        1.5802,
-        1.43859999999999,
-        1.49160000000001,
-        1.1524,
-        1.1892,
-        0.841399999999993,
-        0.879800000000003,
-        0.837599999999995,
-        0.469800000000006,
-        0.765600000000006,
-        0.331000000000003,
-        0.591399999999993,
-        0.601200000000006,
-        0.701599999999999,
-        0.558199999999999,
-        0.339399999999998,
-        0.354399999999998,
-        0.491200000000006,
-        0.308000000000007,
-        0.355199999999996,
-        -0.0254000000000048,
-        0.205200000000005,
-        -0.272999999999996,
-        0.132199999999997,
-        0.394400000000005,
-        -0.241200000000006,
-        0.242000000000004,
-        0.191400000000002,
-        0.253799999999998,
-        -0.122399999999999,
-        -0.370800000000003,
-        0.193200000000004,
-        -0.0848000000000013,
-        0.0867999999999967,
-        -0.327200000000005,
-        -0.285600000000002,
-        0.311400000000006,
-        -0.128399999999999,
-        -0.754999999999995,
-        -0.209199999999996,
-        -0.293599999999998,
-        -0.364000000000004,
-        -0.253600000000006,
-        -0.821200000000005,
-        -0.253600000000006,
-        -0.510400000000004,
-        -0.383399999999995,
-        -0.491799999999998,
-        -0.220200000000006,
-        -0.0972000000000008,
-        -0.557400000000001,
-        -0.114599999999996,
-        -0.295000000000002,
-        -0.534800000000004,
-        0.346399999999988,
-        -0.65379999999999,
-        0.0398000000000138,
-        0.0341999999999985,
-        -0.995800000000003,
-        -0.523400000000009,
-        -0.489000000000004,
-        -0.274799999999999,
-        -0.574999999999989,
-        -0.482799999999997,
-        0.0571999999999946,
-        -0.330600000000004,
-        -0.628800000000012,
-        -0.140199999999993,
-        -0.540600000000012,
-        -0.445999999999998,
-        -0.599400000000003,
-        -0.262599999999992,
-        0.163399999999996,
-        -0.100599999999986,
-        -0.39500000000001,
-        -1.06960000000001,
-        -0.836399999999998,
-        -0.753199999999993,
-        -0.412399999999991,
-        -0.790400000000005,
-        -0.29679999999999,
-        -0.28540000000001,
-        -0.193000000000012,
-        -0.0772000000000048,
-        -0.962799999999987,
-        -0.414800000000014,
+        22.0, 21.119_4, 20.820_8, 20.231_8, 19.77, 19.243_6, 18.777_4,
+        18.284_8, 17.822_4, 17.374_2, 16.933_6, 16.503, 16.049_4, 15.629_2,
+        15.212_4, 14.798, 14.367, 13.972_8, 13.594_4, 13.217, 12.843_8,
+        12.369_6, 12.095_6, 11.704_4, 11.324, 11.066_8, 10.669_8, 10.364_4,
+        10.049, 9.691_8, 9.414_6, 9.082, 8.687, 8.539_8, 8.246_2, 7.857,
+        7.660_6, 7.416_8, 7.124_8, 6.922_2, 6.680_4, 6.447, 6.345_4, 5.959_4,
+        5.763_6, 5.577_6, 5.331, 5.19, 4.967_6, 4.756_4, 4.531_4, 4.444_2,
+        4.370_8, 3.977_4, 3.962_4, 3.879_6, 3.755, 3.472, 3.207_6, 3.102_4,
+        2.890_8, 2.733_8, 2.772_8, 2.629, 2.413, 2.326_6, 2.152_4, 2.264_2,
+        2.180_6, 2.056_6, 1.919_2, 1.759_8, 1.351_6, 1.580_2, 1.438_6, 1.491_6,
+        1.152_4, 1.189_2, 0.841_4, 0.879_8, 0.837_6, 0.469_8, 0.765_6, 0.331,
+        0.591_4, 0.601_2, 0.701_6, 0.558_2, 0.339_4, 0.354_4, 0.491_2, 0.308,
+        0.355_2, -0.025_4, 0.205_2, -0.273, 0.132_2, 0.394_4, -0.241_2, 0.242,
+        0.191_4, 0.253_8, -0.122_4, -0.370_8, 0.193_2, -0.084_8, 0.086_8,
+        -0.327_2, -0.285_6, 0.311_4, -0.128_4, -0.755, -0.209_2, -0.293_6,
+        -0.364, -0.253_6, -0.821_2, -0.253_6, -0.510_4, -0.383_4, -0.491_8,
+        -0.220_2, -0.097_2, -0.557_4, -0.114_6, -0.295, -0.534_8, -0.653_8,
+        0.346_4, 0.039_8, -0.995_8, 0.034_2, -0.523_4, -0.489, -0.274_8,
+        -0.575, -0.482_8, 0.057_2, -0.330_6, -0.628_8, -0.140_2, -0.540_6,
+        -0.446, -0.599_4, -0.262_6, 0.163_4, -0.100_6, -0.395, -1.069_6,
+        -0.836_4, -0.753_2, -0.412_4, -0.790_4, -0.296_8, -0.285_4, -0.193,
+        -0.077_2, -0.962_8, -0.414_8,
     ],
-    // precision 6
     &[
-        45.0,
-        44.1902,
-        43.271,
-        42.8358,
-        41.8142,
-        41.2854,
-        40.317,
-        39.354,
-        38.8924,
-        37.9436,
-        37.4596,
-        36.5262,
-        35.6248,
-        35.1574,
-        34.2822,
-        33.837,
-        32.9636,
-        32.074,
-        31.7042,
-        30.7976,
-        30.4772,
-        29.6564,
-        28.7942,
-        28.5004,
-        27.686,
-        27.291,
-        26.5672,
-        25.8556,
-        25.4982,
-        24.8204,
-        24.4252,
-        23.7744,
-        23.0786,
-        22.8344,
-        22.0294,
-        21.8098,
-        21.0794,
-        20.5732,
-        20.1878,
-        19.5648,
-        19.2902,
-        18.6784,
-        18.3352,
-        17.8946,
-        17.3712,
-        17.0852,
-        16.499,
-        16.2686,
-        15.6844,
-        15.2234,
-        14.9732,
-        14.3356,
-        14.2286,
-        13.7262,
-        13.3284,
-        13.1048,
-        12.5962,
-        12.3562,
-        12.1272,
-        11.4184,
-        11.4974,
-        11.0822,
-        10.856,
-        10.48,
-        10.2834,
-        10.0208,
-        9.637,
-        9.51739999999999,
-        9.05759999999999,
-        8.74760000000001,
-        8.42700000000001,
-        8.1326,
-        8.2372,
-        8.2788,
-        7.6776,
-        7.79259999999999,
-        7.1952,
-        6.9564,
-        6.6454,
-        6.87,
-        6.5428,
-        6.19999999999999,
-        6.02940000000001,
-        5.62780000000001,
-        5.6782,
-        5.792,
-        5.35159999999999,
-        5.28319999999999,
-        5.0394,
-        5.07480000000001,
-        4.49119999999999,
-        4.84899999999999,
-        4.696,
-        4.54040000000001,
-        4.07300000000001,
-        4.37139999999999,
-        3.7216,
-        3.7328,
-        3.42080000000001,
-        3.41839999999999,
-        3.94239999999999,
-        3.27719999999999,
-        3.411,
-        3.13079999999999,
-        2.76900000000001,
-        2.92580000000001,
-        2.68279999999999,
-        2.75020000000001,
-        2.70599999999999,
-        2.3886,
-        3.01859999999999,
-        2.45179999999999,
-        2.92699999999999,
-        2.41720000000001,
-        2.41139999999999,
-        2.03299999999999,
-        2.51240000000001,
-        2.5564,
-        2.60079999999999,
-        2.41720000000001,
-        1.80439999999999,
-        1.99700000000001,
-        2.45480000000001,
-        1.8948,
-        2.2346,
-        2.30860000000001,
-        2.15479999999999,
-        1.88419999999999,
-        1.6508,
-        0.677199999999999,
-        1.72540000000001,
-        1.4752,
-        1.72280000000001,
-        1.66139999999999,
-        1.16759999999999,
-        1.79300000000001,
-        1.00059999999999,
-        0.905200000000008,
-        0.659999999999997,
-        1.55879999999999,
-        1.1636,
-        0.688199999999995,
-        0.712600000000009,
-        0.450199999999995,
-        1.1978,
-        0.975599999999986,
-        0.165400000000005,
-        1.727,
-        1.19739999999999,
-        -0.252600000000001,
-        1.13460000000001,
-        1.3048,
-        1.19479999999999,
-        0.313400000000001,
-        0.878999999999991,
-        1.12039999999999,
-        0.853000000000009,
-        1.67920000000001,
-        0.856999999999999,
-        0.448599999999999,
-        1.2362,
-        0.953399999999988,
-        1.02859999999998,
-        0.563199999999995,
-        0.663000000000011,
-        0.723000000000013,
-        0.756599999999992,
-        0.256599999999992,
-        -0.837600000000009,
-        0.620000000000005,
-        0.821599999999989,
-        0.216600000000028,
-        0.205600000000004,
-        0.220199999999977,
-        0.372599999999977,
-        0.334400000000016,
-        0.928400000000011,
-        0.972800000000007,
-        0.192400000000021,
-        0.487199999999973,
-        -0.413000000000011,
-        0.807000000000016,
-        0.120600000000024,
-        0.769000000000005,
-        0.870799999999974,
-        0.66500000000002,
-        0.118200000000002,
-        0.401200000000017,
-        0.635199999999998,
-        0.135400000000004,
-        0.175599999999974,
-        1.16059999999999,
-        0.34620000000001,
-        0.521400000000028,
-        -0.586599999999976,
-        -1.16480000000001,
-        0.968399999999974,
-        0.836999999999989,
-        0.779600000000016,
-        0.985799999999983,
+        45.0, 44.190_2, 43.271, 42.835_8, 41.814_2, 41.285_4, 40.317, 39.354,
+        38.892_4, 37.943_6, 37.459_6, 36.526_2, 35.624_8, 35.157_4, 34.282_2,
+        33.837, 32.963_6, 32.074, 31.704_2, 30.797_6, 30.477_2, 29.656_4,
+        28.794_2, 28.500_4, 27.686, 27.291, 26.567_2, 25.855_6, 25.498_2,
+        24.820_4, 24.425_2, 23.774_4, 23.078_6, 22.834_4, 22.029_4, 21.809_8,
+        21.079_4, 20.573_2, 20.187_8, 19.564_8, 19.290_2, 18.678_4, 18.335_2,
+        17.894_6, 17.371_2, 17.085_2, 16.499, 16.268_6, 15.684_4, 15.223_4,
+        14.973_2, 14.335_6, 14.228_6, 13.726_2, 13.328_4, 13.104_8, 12.596_2,
+        12.356_2, 12.127_2, 11.418_4, 11.497_4, 11.082_2, 10.856, 10.48,
+        10.283_4, 10.020_8, 9.637, 9.517_4, 9.057_6, 8.747_6, 8.427, 8.132_6,
+        8.237_2, 8.278_8, 7.677_6, 7.792_6, 7.195_2, 6.956_4, 6.645_4, 6.87,
+        6.542_8, 6.2, 6.029_4, 5.627_8, 5.678_2, 5.792, 5.351_6, 5.283_2,
+        5.039_4, 5.074_8, 4.491_2, 4.849, 4.696, 4.540_4, 4.073, 4.371_4,
+        3.721_6, 3.732_8, 3.420_8, 3.418_4, 3.942_4, 3.277_2, 3.411, 3.130_8,
+        2.769, 2.925_8, 2.682_8, 2.750_2, 2.706, 2.388_6, 3.018_6, 2.451_8,
+        2.927, 2.417_2, 2.411_4, 2.033, 2.512_4, 2.556_4, 2.600_8, 2.417_2,
+        1.804_4, 1.997, 2.454_8, 1.894_8, 2.234_6, 2.308_6, 2.154_8, 1.884_2,
+        1.650_8, 0.677_2, 1.725_4, 1.475_2, 1.722_8, 1.661_4, 1.167_6, 1.793,
+        1.000_6, 0.905_2, 0.66, 1.558_8, 1.163_6, 0.688_2, 0.712_6, 0.450_2,
+        1.197_8, 0.975_6, 0.165_4, 1.727, -0.252_6, 1.197_4, 1.134_6, 1.304_8,
+        1.194_8, 0.313_4, 0.879, 1.120_4, 0.853, 1.679_2, 0.857, 0.448_6,
+        1.236_2, 0.953_4, 1.028_6, 0.563_2, 0.663, 0.723, 0.756_6, -0.837_6,
+        0.256_6, 0.62, 0.821_6, 0.216_6, 0.205_6, 0.220_2, 0.372_6, 0.334_4,
+        0.928_4, 0.972_8, 0.192_4, 0.487_2, -0.413, 0.807, 0.120_6, 0.769,
+        0.870_8, 0.665, 0.118_2, 0.401_2, 0.635_2, 0.135_4, 0.175_6, 1.160_6,
+        0.346_2, 0.521_4, -0.586_6, -1.164_8, 0.968_4, 0.837, 0.779_6, 0.985_8,
     ],
-    // precision 7
     &[
         91.0,
         89.4934,
@@ -4060,3 +3748,36 @@ pub const BIAS_DATA: &[&[f64]] = &[
         -713.308999999892,
     ],
 ];
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_estimates_are_sorted() {
+        for (i, estimates) in RAW_ESTIMATE_DATA.iter().enumerate() {
+            let precision = i + 4;
+            assert!(
+                estimates.windows(2).all(|w| w[0] <= w[1]),
+                "Estimates for precision {} is not sorted",
+                precision
+            );
+        }
+    }
+
+    #[test]
+    fn test_length_compatibility() {
+        assert_eq!(RAW_ESTIMATE_DATA.len(), 15);
+        for (i, (estimates, biases)) in
+            RAW_ESTIMATE_DATA.iter().zip(BIAS_DATA.iter()).enumerate()
+        {
+            let precision = i + 4;
+            assert_eq!(
+                estimates.len(),
+                biases.len(),
+                "Estimates and biases for precision {} have different lengths",
+                precision
+            );
+        }
+    }
+}
diff --git a/src/encoding.rs b/src/encoding.rs
index 83c24b5..1d61c17 100644
--- a/src/encoding.rs
+++ b/src/encoding.rs
@@ -2,6 +2,7 @@ use serde::{Deserialize, Serialize};
 
 // A Vector of bytes containing variable length encoded unsigned integers.
 #[derive(Clone, Debug, Serialize, Deserialize)]
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 pub struct VarIntVec(Vec<u8>);
 
 // A Vector containing difference encoded unsigned integers
@@ -10,6 +11,7 @@ pub struct VarIntVec(Vec<u8>);
 // Numbers stored are assumed to be in increasing order, hence the
 // difference between a new number and `last` will always be positive.
 #[derive(Clone, Debug, Serialize, Deserialize)]
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 pub struct DifIntVec {
     // The count of numbers stored.
     count: usize,
@@ -19,11 +21,13 @@ pub struct DifIntVec {
     buf:   VarIntVec,
 }
 
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 pub struct VarIntVecIntoIter<'a> {
     index: usize,
     inner: &'a VarIntVec,
 }
 
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 pub struct DifIntVecIntoIter<'a> {
     index: usize,
     last:  u32,
diff --git a/src/hyperloglog.rs b/src/hyperloglog.rs
index 6bda970..8c52caf 100644
--- a/src/hyperloglog.rs
+++ b/src/hyperloglog.rs
@@ -42,6 +42,7 @@ use crate::HyperLogLogError;
 ///   Meunier.](http://algo.inria.fr/flajolet/Publications/FlFuGaMe07.pdf)
 ///
 #[derive(Clone, Debug, Serialize, Deserialize)]
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 pub struct HyperLogLogPF<H, B>
 where
     H: Hash + ?Sized,
@@ -62,7 +63,7 @@ where
     // Minimum precision allowed.
     const MIN_PRECISION: u8 = 4;
     // Maximum precision allowed.
-    const MAX_PRECISION: u8 = 16;
+    const MAX_PRECISION: u8 = 18;
 
     /// Creates a new HyperLogLogPF instance.
     pub fn new(precision: u8, builder: B) -> Result<Self, HyperLogLogError> {
@@ -204,6 +205,7 @@ mod tests {
     use core::hash::{BuildHasher, Hasher};
     use siphasher::sip::SipHasher13;
 
+    #[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
     struct PassThroughHasher(u64);
 
     impl Hasher for PassThroughHasher {
@@ -222,6 +224,7 @@ mod tests {
     }
 
     #[derive(Serialize, Deserialize)]
+    #[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
     struct PassThroughHasherBuilder;
 
     impl BuildHasher for PassThroughHasherBuilder {
@@ -233,6 +236,7 @@ mod tests {
     }
 
     #[derive(Serialize, Deserialize)]
+    #[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
     struct DefaultBuildHasher;
 
     impl BuildHasher for DefaultBuildHasher {
diff --git a/src/hyperloglogplus.rs b/src/hyperloglogplus.rs
index 9264ced..5b2cab4 100644
--- a/src/hyperloglogplus.rs
+++ b/src/hyperloglogplus.rs
@@ -54,6 +54,7 @@ use crate::HyperLogLogError;
 ///   Nunkesser and Alexander Hall.](https://goo.gl/iU8Ig)
 ///
 #[derive(Clone, Debug, Serialize, Deserialize)]
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 pub struct HyperLogLogPlus<H, B>
 where
     H: Hash + ?Sized,
@@ -534,6 +535,7 @@ mod tests {
     use std::collections::hash_map::DefaultHasher;
     use std::hash::{BuildHasher, Hasher};
 
+    #[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
     struct PassThroughHasher(u64);
 
     impl Hasher for PassThroughHasher {
@@ -552,6 +554,7 @@ mod tests {
     }
 
     #[derive(Serialize, Deserialize)]
+    #[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
     struct PassThroughHasherBuilder;
 
     impl BuildHasher for PassThroughHasherBuilder {
@@ -563,6 +566,7 @@ mod tests {
     }
 
     #[derive(Serialize, Deserialize)]
+    #[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
     struct DefaultBuildHasher;
 
     impl BuildHasher for DefaultBuildHasher {